Key Terms

On-ball defense

Guarding the player with the ball while staying in stance, matching the scout, and making every catch, dribble, and shot uncomfortable.

Stance

Low, balanced defensive posture with knees bent, hips loaded, chest up, and active hands.

Slide / Drop step

Lateral footwork to stay square, with a drop step used to recover, turn, and cut off the ball when beaten.

Deny

Taking away the next pass by putting your body and hand in the passing lane.

Shell principles

The basic team rules of guard ball, jump to the ball, help the helper, and move on airtime.

Pack line / Pressure

Pack line keeps off-ball defenders inside an imaginary arc to protect the paint; pressure extends defenders into the offense to disrupt rhythm.

Ball screen

An on-ball screen set for the ballhandler, including high, side, flat, drag, and empty-side pick-and-rolls.

Drop coverage

The screener's defender stays back between roller and rim while the on-ball defender fights over or around the screen.

ICE / Down

Side ball-screen coverage that forces the ball away from the middle and down the sideline or baseline, denying use of the screen.

Show and recover

A quick hedge where the screener's defender shows a body to the ball and immediately snaps back to the original assignment.

Under / Over

The on-ball defender's path on a screen: over the top to stay attached to shooters, under the screen against non-shooters.

Late switch / Peel switch

A delayed exchange after the original coverage breaks down, often used to handle slips, short rolls, or beaten defenders.

Short roll

The screener rolls into the free-throw line or short-corner area instead of all the way to the rim.

Down screen / Pin down

A screen set from high to low or from the lane area to free a shooter moving up to the perimeter.

Flare screen

A screen that sends a teammate away from the ball toward the sideline or corner for a catch-and-shoot.

Back screen

A screen set behind a defender to free a cutter going toward the rim.

Cross screen

A baseline or block-to-block screen, usually used to free a post player near the rim.

Stagger

Two off-ball screens in a row for the same cutter.

Slip

The screener fakes setting a screen, then cuts hard to space or the rim before establishing contact.

Top-lock

A defender jumps to the high side of a shooter to take away the normal route off a screen and force a backdoor cut.

Lock and trail

A defender chases tight behind a shooter coming off a screen, staying attached while help protects the curl.

Shoot the gap

A defender cuts between screener and cutter to beat the action to the spot.

Switch off-ball

Two defenders exchange assignments away from the ball to stay connected through screening action.

Help-side

The side of the floor away from the ball where defenders shrink toward the lane to protect paint touches and cuts.

Strong side / Weak side

Strong side is the ball side; weak side is the opposite side where the deepest help usually lives.

Scram switch

An off-ball switch that pulls a small defender out of a post mismatch after an earlier switch created a bad matchup.

Shrink / Close the gap

All five defenders pull toward the paint when the ball is above the break, showing bodies to deter drives.

Pack the paint

A five-player emphasis on keeping the ball out of the lane and forcing contested shots over the top.

Ice the post

Fronting or three-quartering the post while help is loaded from a designated side to discourage deep catches.

Wall up

Verticality at the rim: chest up, arms straight, absorb contact, and contest without swiping down.

Contain press

Full- or three-quarter-court pressure designed to slow the offense and drain clock without heavy gambling.

Run-and-jump

A full-court trap where the on-ball defender corrals the dribble and a second defender jumps to trap.

Side trap / Corner trap

A two-player trap using the sideline or corner as an extra defender.

Denial press

Pressure that takes away the inbound or first pass to force rushed entries, five-second calls, or catches in bad spots.

Match-up press

A press that starts with man principles and can morph into a zone shape as the ball advances.

Safety / Center fielder

The deep defender responsible for long passes behind the press and emergency rim protection.

Man-to-man

Each defender guards a specific offensive player, with team help rules behind the matchup.

Zone defense

Defenders guard areas and responsibilities instead of one fixed matchup, such as 2-3, 3-2, 1-3-1, box-and-one, or triangle-and-two.

Match-up zone

A zone that uses man-to-man principles, matching cutters, handing off assignments, and changing shape as the ball moves.

Ball-side / Weak-side I

Two help defenders stacked in the lane like an I, protecting the rim and drop-off passes.

Shell drill

Core teaching drill for man defense that emphasizes ball pressure, help, closeouts, and communication.

Kill / Stop

A defensive possession that ends with no score; many programs call three stops in a row a kill.

No paint touch

Team standard that the ball cannot be dribbled or passed into the lane without a crowd, contest, or trap.

Ball, Help, Gap

Simple defensive talk that names who is pressuring the ball, who is protecting the paint, and who is sitting in the driving gap.

Shot, Box out

The shot-release call that triggers contact first, then pursuit of the rebound.

Tag, Go, Switch

Short rotation commands used on screens, rolls, drives, and scramble situations.

Early, Loud, Continuous

The standard for defensive talking: communicate before the action, with enough volume to be heard, and keep talking through the possession.

Next

Call that the next defender in the rotation is taking a cutter, ballhandler, or open threat in a scramble.

Box out

Make contact and seal your player away from the rim before going for the rebound.

Crash

Go aggressively to the offensive glass after a shot.

Release

Guard or wing who leaks out when the shot goes up to ignite the break before the defense can recover.

Hit-and-go-get

Make contact first (hit), then pursue the ball. Emphasis phrase for contested rebounding situations.

5-out / 4-out 1-in

All five players on the perimeter (5-out) vs. four around one post inside (4-out 1-in). The alignment determines spacing and drive lanes.

Drive-and-kick

Attack off the dribble to draw help, then kick out to an open teammate on the perimeter.

Kick-ahead

Pass the ball up the floor in transition instead of dribbling — gets the ball ahead faster than any ball handler can run.

Paint touch

Getting the ball into the lane via drive or pass to collapse the defense and create open kick-outs.

Corner spacing / 45° cut

Corner players hold spacing or cut into the lane at the "45" angle when their defender helps on a drive.

Transition

Phase from defense to offense (or offense to defense) before both teams are fully set.

Primary break

First push up the floor for layups or early threes before the defense can organize and outnumber.

Secondary break

Organized actions — drag screen, trailer, wide pins — that follow the initial break if the primary doesn't produce a shot.

Advantage / Disadvantage

Numbers or closeout situations to recognize and attack: 2-on-1, 3-on-2, or a defender caught on a long closeout.

Man-to-man

Each defender is responsible for guarding a specific offensive player.

Zone

Defenders guard areas of the floor (e.g., 2–3, 1–3–1) rather than individual players.

Turnover

Loss of possession before a shot — via steal, bad pass, violation, or out of bounds.

And-one

Player scores while being fouled and earns one additional free throw attempt.

Field goal % / Free throw %

Share of shots made from the field (FG%) or from the free-throw line (FT%).