A block and tackle composed of two pulley blocks, each of which has two sheaves (pulleys). / (rugby) A tackle by two players of the same time on an opposition player.

(American football) A tackle that causes a loss of yardage for the opposing running back or wide receiver.

plural of tackle block

(mechanics) A pulley over which a rope runs.

(nautical) The ropes that are tightened to reef a sail or loosened to fully extend it.

Without tacks.