Noun

(nautical) A system of ropes and blocks used to increase the force applied to the free end of the rope.

(fishing, uncountable) Equipment (rod, reel, line, lure, etc.) used when angling.

(uncountable, informal) By extension, any piece of equipment, particularly gadgetry.

* 2004 June 24–30, "Jeff Gordon Never Gets Tired Of Seeing Face On Cheap Plastic Crap", '', available in ''Embedded in America , ISBN 1400054567, page 193,

... an illuminated license-plate frame bearing his likeness, signature, and yellow number 24. "That there's a real nice piece of tackle . ..."

(sports, countable) A play where a player attempts to take control over the ball from an opponent, as in rugby or football.

(American football, countable) A play where a defender brings the ball carrier to the ground.

(countable) Any instance in which one person forces another to the ground.

(American football, uncountable) The offensive positions between each guard and end, offensive tackle.

(American football, countable) A person playing that position.

(American football, uncountable) The defensive positions between two ends, defensive tackle.

(American football, countable) A person playing that position.

(slang) A man's genitalia.

Noun

(uncountable) The quality of being different.

(countable) A characteristic of something that makes it different from something else.

* {{quote-magazine, title=Towards the end of poverty

, date=2013-06-01, volume=407, issue=8838, page=11, magazine=(The Economist) citation , passage=But poverty’s scourge is fiercest below $1.25 (the average of the 15 poorest countries’ own poverty lines, measured in 2005 dollars and adjusted for differences in purchasing power): people below that level live lives that are poor, nasty, brutish and short.}}

(countable) A disagreement or argument.

We have our little differences , but we are firm friends.

* Shakespeare

What was the difference ? It was a contention in public.

* T. Ellwood

Away therefore went I with the constable, leaving the old warden and the young constable to compose their difference as they could.

(countable, uncountable) Significant change in or effect on a situation or state.

* 1908 , (Kenneth Grahame), (The Wind in the Willows)

The line of the horizon was clear and hard against the sky, and in one particular quarter it showed black against a silvery climbing phosphorescence that grew and grew. At last, over the rim of the waiting earth the moon lifted with slow majesty till it swung clear of the horizon and rode off, free of moorings; and once more they began to see surfaces—meadows wide-spread, and quiet gardens, and the river itself from bank to bank, all softly disclosed, all washed clean of mystery and terror, all radiant again as by day, but with a difference that was tremendous.

(countable) The result of a subtraction; sometimes the absolute value of this result.

(obsolete) Choice; preference.

* Spenser

That now be chooseth with vile difference / To be a beast, and lack intelligence.

(heraldry) An addition to a coat of arms to distinguish two people's bearings which would otherwise be the same. See augmentation and cadency.

(logic) The quality or attribute which is added to those of the genus to constitute a species; a differentia.

(logic circuits) A Boolean operation which is TRUE when the two input variables are different but is otherwise FALSE; the XOR operation ($\backslash scriptstyle\; A\; \backslash overline\; B\; +\; \backslash overline\; A\; B$).

(relational algebra) the set of elements that are in one set but not another ($\backslash scriptstyle\; A\; \backslash overline\; B$).