Added 10 October 2026 perpendicularly adverb Categories: Describing WordsRare Words adverb ! Definition from WordNet 3.1, Princeton University. More about perpendicularly at Wordnik → Where our words come from → Straight up or down without a break. In a perpendicular manner. this red line runs perpendicularly to the green line Related Words: sheertransverselynormalorthogonallyplumbparaxiallytransversallyperimetricallyperiprandiallyparalaterallytangentiallyperiaortically Back to today's word