KATYDID Meaning of KATYDID in English ka ‧ ty ‧ did /ˈkeɪtidɪd/ BrE AmE noun [countable] [ Date: 1700-1800 ; Origin: From the sound ] American English a type of large ↑ grasshopper Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012