- tackled, hit, or attacked by an opponent on the blind side, out of the player’s field of vision: The blindsided offensive lineman was taken down by the defensive tackle coming around the other way.
- attacked critically or taken by surprise where one is vulnerable, uninformed or unprepared, etc.: Told by a cryptic university official that his keynote address was being canceled “for political reasons,” the blindsided philanthropist was left searching for answers.
- (of such an attack, tackle, etc.) delivered from the blind side, unexpectedly, or in a way that exposes or takes advantage of a vulnerability: A staff meeting is no place for a blindsided assault on an administrator.
- the simple past tense and past participle of blindside.
