Trick  —n. 1 action or scheme undertaken to deceive or outwit. 2 illusion (trick of the light). 3 special technique; knack. 4 a feat of skill or dexterity. B unusual action (e.g. Begging) learned by an animal. 5 foolish or discreditable act; practical joke (a mean trick to play). 6 idiosyncracy (has a trick of repeating himself). 7 a cards played in one round of a card-game. B point gained in this. 8 (attrib.) Done to deceive or mystify (trick photography; trick question). —v. 1 deceive by a trick; outwit. 2 (often foll. By out of) swindle (tricked out of his savings). 3 (foll. By into) cause to do something by trickery (tricked into marriage; tricked me into agreeing). 4 foil, baffle; take by surprise.  do the trick colloq. Achieve the required result. How's tricks? Colloq. How are you? Trick or treat esp. Us children's custom of calling at houses at hallowe'en with the threat of pranks if they are not given a small gift. Trick out (or up) dress or deck out. [french]