With Key’s online banking and mobile app, you can bank without going to the bank — and make what might be a busy day, a little less busy. 3 days ago · The meaning of KEY is a usually metal instrument that is used to open a lock or to start or access a mechanism. How to use key in a sentence. Of crucial importance; significant: key decisions; the key element of the thesis. A key is a specially shaped piece of metal that you place in a lock and turn in order to open or lock a door, or to start or stop the engine of a vehicle. They put the key in the door and entered. Definition of key noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 6 days ago · A key (object designed to open and close a lock) A numeric keypad with 16 keys The keys of a musical keyboard. A telegraph key Something regarded as like a key in opening or closing a way, revealing or concealing, etc. KEY definition: a small metal instrument specially cut to fit into a lock and move its bolt. See examples of key used in a sentence.
