The action of the verb to smile.
"She greeted her friend with a warm, genuine smiling that lit up her entire face."
In plain English: A smile is an expression on your face where you curve your lips up to show happiness or friendliness.
"The smiling on her face made everyone feel welcome immediately."
present participle of smile
"The smiling child waved hello to her friends as she ran down the sidewalk."
In plain English: Smiling means to curve your lips up into a happy expression that shows you are pleased or amused.
"She kept smiling at him even though she was tired."
That smiles or has a smile.
"The woman standing by the door was smiling when she saw us."
In plain English: Smiling describes someone who looks happy and friendly because they are showing their teeth with an upturned mouth.
"She had a smiling face when she greeted her friends."