smile

Concise Oxford English Dictionary © 2008 Oxford University Press:
smile/smʌɪl/

▶verb

• 1 form one's features into a pleased, friendly, or amused expression, with the corners of the mouth turned up.

• 2 (smile at/on/upon) regard favourably or indulgently.

▶noun a smiling expression.

– derivatives
smiler noun,
smiling adjective,
smilingly adverb.

– origin ME: perh. of Scand. origin; rel. to smirk.