To withdraw one's support or help from, especially in spite of duty, allegiance, or responsibility; desert: abandon a friend in trouble. To give up by leaving or ceasing to operate or inhabit, especially as a result of danger or other impending threat: abandoned the ship. To surrender one's claim to, right to, or interest in; give up entirely: abandon a belief. See Synonyms at relinquish. To cease trying to continue; desist from: abandoned the search for the missing hiker. To yield (oneself) completely, as to emotion.