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1. The equipment used in a particular activity, especially in fishing; gear.
a. (often tā′kəl) Nautical A system of ropes and blocks for raising and lowering weights of rigging and pulleys for applying tension.
b. A rope and its pulley.
3. Sports
a. The act of stopping an opposing player carrying the ball, especially by forcing the opponent to the ground, as in football or Rugby.
b. The act of obstructing a player in order to cause loss of possession of the ball, as in soccer.
4. Football
a. One of two offensive linemen positioned between the guard and the end on either side of the ball.
b. One of two defensive linemen positioned to the inside of either end.
c. Tackle football.
v. tack·led, tack·ling, tack·les
v.tr. Sports
1. To grab hold of and wrestle with (an opponent).
2. Sports
a. To stop (an opponent carrying the ball), especially by forcing the opponent to the ground.
b. To obstruct (a player with the ball) in order to cause loss of possession of the ball.
3. To engage or deal with: tackle a perplexing problem.
4. To harness (a horse).
v.intr. Sports
To tackle an opponent in possession of the ball.

[Middle English takel, from Middle Dutch or Middle Low German; perhaps akin to Middle Dutch taken, to seize, grasp.]

tack′ler n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tackler - a football player who tackles the ball carriertackler - a football player who tackles the ball carrier
football player, footballer - an athlete who plays American football
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
They were quite close to him now, and crouching low, like tacklers on a gridiron.
Coaching Points: On "Break down!", the tackler assumes the proper base hitting position and the runner (O) reaches a hand shield and focuses on running a path to the lower right cone.
Top tackler and player of the match was Joe and most improved player went to Edward.
McGeechan's gripe centred on what he saw as the different way the contact zone was officiated compared to the Guinness Premiership, where players have to stay on their feet and there's an onus on the tackler to get off the ball.
"I am no great tackler but there was no intent," said the Scot.
Thompson, a 15-year-old running back, caught a pass on the sideline and attempted to lower his head and run through an approaching tackler. The tragic consequence was a severed spinal cord and quadriplegia.
Charlton's Republic of Ireland international Mark Kinsella ties with Winterburn as the Premiership's top tackler with a success rate of 78 per cent from his 69 challenges made this season.
Joint top tackler award went to Nathan, who was always looking for the ball and put in some strong tackles.
Riveting!: British Bulldogs-The Rules:1 The group of participants is split into 'runners' and 'tacklers' 2 To begin with, one person is designated a tackler 3 The rest of the group are designated runners 4 The group of runners charge en masse at the lone tackler - the tackler's aim is to stop a runner on each charge by tackling him 5 When a runner is caught, they become a tackler 6 The aim of the game is to be the only runner left - the Last Man Standing
When contact is made, referees will assess the tackler's speed and acceleration into contact, and whether they are trying to make a dominant or passive tackle.
CIRCUMSTANCES WARRANTING A PENALTY ONLY Any yellow card offence where mitigation is applied.Shoulder charge to the body (no head or neck contact), with a low degree of danger.High tackle with first contact from the tackler's arm, which starts elsewhere on the body and then slips or moves up to the ball carrier's head or neck, with low degree of danger.High tackle with first contact above or over the shoulder of the ball carrier, but without contact to the head or neck of the ball carrier during the execution of the tackle (seat belt tackle).
In a statement, World Rugby said: "Rugby is committed to an evidence-based approach to injuryprevention, and with the latest comprehensive research determining that tacklers who are upright carrying the greatest risk of head-injury, the trials are designed to change player behaviour by getting the tackler to attempt lower tackles and therefore lower the risk of injury.