To put down or deposit as a wager; to stake, bet, or wager (a sum, one's head, life, etc.). Also to lay a wager.

A stake in a game or wager. Also figurative. †to lay wed: to wager (cf. 2c).

intransitive. To wager, hazard money, on the event of a game or contest. Now apprehended as absolute use of sense 3.

intransitive. To offer or lay a wager, to make a bet.

absol. To lay a wager. you bet (slang, chiefly in U.S.): be assured, certainly; also you bet you.

intransitive. To play games for stakes, as cards, dice, etc., or bet on the outcome of particular events, e.g. the result of a race or other sporting…

colloquial. intransitive. To gamble, bet; to speculate. Obsolete.

intransitive and transitive. euphemistic. To bet (money) on a horse or horse racing, in the football pools, etc.

intransitive. gen. To bet or speculate upon something, esp. a horse; to gamble.