Off one's guard Meaning, Definition & Usage

  1. adjective satellite not prepared or vigilant
    off her guard; off guard; napping; off his guard; off-guard; off your guard.
    • the blow caught him napping
    • caught in an off-guard moment
    • found him off his guard

WordNet


Definitions
  1. in a careless state; inattentive; unsuspicious of danger.

Webster 1913