“left”

Designating the side of the body toward the west when one is facing north; the side of the body on which the heart is located in most humans; the opposite of right. This arrow points to the reader's left: ←

A bounding straight edge of a two-dimensional shape.

Other people.

The direction towards the pole to the left-hand side of someone facing east, specifically 0°, or (on another celestial object) the direction towards the pole lying on the northern side of the invariable plane.

The part of something that faces out; the outer surface.

An amount obtained by the addition of smaller amounts.

The interior or inner part.