1. Not prepared or vigilant
   "found him off his guard"
   - napping, off-guard, off guard, off one's guard, off her guard, off your guard

See also: unready

• defame
• defamer
• defang
• defat
• default
• default judgement
• default judgment
• default on
• default option
• defaulter
• defeasance
• defeasible
• defeat
• defeated
• defeatism
• defeatist
• defecate
• defecation
• defecation reflex
• defecator
• defect
• defect of speech
• defection
• defectionist
• defective