noun
blackjack
BLAKD-zhak
noun
1
A short, heavy club with a flexible handle, used as a weapon.
"The guard carried a blackjack for protection."
verb
1
To hit someone with a blackjack or similar weapon.
"He was blackjacked from behind and robbed."
How to Use Blackjack
Learner’s notesIn plain EnglishA small hand club used as a weapon, or the card game of the same name.
Common mistake
Also the name of the popular card game (aiming for a hand value of 21) — context makes clear which sense is meant.
Word Forms
blackjacked past tense, Blackjacks plural, blackjacks singular
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The guard carried a _____ for protection.
Etymology
From black plus jack, likely referring to the leather-covered club.