| 1. | not guarded; unprotected; undefended. |
| 2. | open; frank; guileless: an unguarded manner. |
| 3. | exposed to attack or capture by the opponent without recourse by the player, as a card, chess piece, etc.: an unguarded queen of clubs; an unguarded pawn. |
| 4. | not cautious or discreet; careless: In an unguarded moment he had told her about his affair. |
| 5. | without a safeguard, as a cover, barrier, or shield, for protection: an unguarded buzz saw. |