1. smile from ear to ear - Noun
2. smile from ear to ear - Verb
smile from ear to ear (plural smiles from ear to ear)
(idiomatic) A large smile.
smile from ear to ear (third-person singular simple present smiles from ear to ear, present participle smiling from ear to ear, simple past and past participle smiled from ear to ear)
(idiomatic) To smile widely or expressively; to be in a state of great happiness.
Synonyms: grin from ear to ear, grin like a Cheshire cat