TWEETER Meaning of TWEETER in English tweet ‧ er /ˈtwiːtə $ -ər/ BrE AmE noun [countable] a ↑ speaker (=piece of equipment) through which the high sounds from a ↑ stereo etc are made louder ⇨ woofer Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012