SmILE is a showcase car designed for Greenpeace in 1996 to demonstrate how fuel efficient a car can be. The name stands for "Small, Intelligent, Light, Efficient'. It is based on the Renault Twingo, halving its fuel consumption to 3.3 l/100km (30 km/l or 85 mpg (imperial) / 68 mpg (US)).

A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a "Duchenne smile". Smiles performed without the eye contraction can be perceived as "fake".

Smile (occasionally typeset as SMiLE) was a projected album by American rock band the Beach Boys intended to follow their 11th studio album Pet Sounds. After the group's songwriting leader Brian Wilson abandoned large portions of music recorded between 1966 and 1967, the band recorded and released the dramatically scaled-down Smiley Smile album in its place. Some of the original Smile tracks eventually found their way onto subsequent Beach Boys studio and compilation albums. As more fans learned of the project's origins, details of its recordings acquired considerable mystique, and it was later acknowledged as the most legendary unreleased album in the history of popular music.

A smile is a facial expression.