1. Not prepared or vigilant
   "caught in an off-guard moment"
   - napping, off guard, off one's guard, off his guard, off her guard, off your guard

See also: unready

• democratise
• democratization
• democratize
• Democritus
• demodulate
• demodulation
• demodulator
• Demogorgon
• demographer
• demographic
• demographist
• demography
• demoiselle
• demolish
• demolished
• demolishing
• demolition
• demon
• demon-ridden
• demonetisation
• demonetise
• demonetization
• demonetize
• demoniac
• demoniacal