I. wa ‧ ger 1 /ˈweɪdʒə $ -ər/ BrE AmE noun [countable] old-fashioned
[ Date: 1300-1400 ; Language: Anglo-French ; Origin: wageure , from Old North French wagier ; ⇨ ↑ wage 2 ]
an agreement in which you win or lose money according to the result of something such as a race SYN bet
II. wager 2 BrE AmE verb [transitive] old-fashioned
1 . to agree to win or lose an amount of money on the result of something such as a race SYN gamble
wager something on something
Stipes wagered all his money on an unknown horse.
2 . I’ll wager used to say that you are confident that something is true