› If a boat is adrift, it is moving on the water but is not controlled by anyone because of a problem: He spent three days adrift on his yacht.Terms for location and direction used at sea › If a person is adrift, they do not have a clear purpose in life or know what they want to do: Da Silva plays a bright, lonely student from New York, adrift in small-town Arizona.Useless and futile go/come adrift informal › to become loose: The hem of my skirt's come adrift again.Flexible, loose and yielding go adrift informal › If plans go adrift, they fail or do not produce the correct results: Something seems to have gone adrift in our calculations.Faults and mistakes