blindside /ˈblaɪndˌsaɪd/noun 5verb 2forms 3 noun5 •A driver's field of blindness around an automobile; the side areas behind the driver. •A tram/train driver's field of blindness around a tram (trolley/streetcar) or a train; the side areas behind the tram/train driver. •The blindside flanker, a position in rugby union, usually number 6.The blindside packs down at the scrum on the blindside. •The space on the side of the pitch with the shorter distance between the breakdown/set piece and the touchline; compare openside.Showing no ill-effects from her lay-off, the full-back had already beaten three defenders on a jagging kick return, when she was sprung down the blindside a minute later. — 2025 •(figurative) A person's weak point. verb2 •To attack (a person) on their blind side.The robbers crept out of the forest and blindsided the traveller. •(informal, figurative) To catch off guard; to take by surprise.He had completed his plan to develop a new office building, but was blindsided by the sudden drop in real estate values. formsblindsided · blindsiding · blindsides