When you undress or undress someone, you take off your clothes or someone else's clothes. She went out, leaving Rachel to undress and have her shower She undressed the child before putting her in the tin bath. when you are wearing few or no clothes
remove (someone's or one's own) clothes; "The nurse quickly undressed the accident victim"; "She divested herself of her outdoor clothes"; "He disinvested himself of his garments"
partial or complete nakedness; "a state of undress" get undressed; "please don't undress in front of everybody!"; "She strips in front of strangers every night for a living