1. dishonest or untrustworthy people; rogues or scoundrels
Usage: somewhat archaic or literary
2. jacks in a deck of playing cards
Usage: card games

Examples

• The story featured a band of knaves who cheated innocent travelers.
• Shakespeare often wrote about knaves and their schemes.
• He called them knaves for breaking their promise.
• The poker hand contained two knaves and three queens.
• In bridge, the knaves are worth significant points.
• She drew the knave of hearts from the deck.