apron

A protective garment worn over clothes to keep them clean.

"She tied her apron before baking the cake."

A paved area at an airport for aircraft parking, loading, and refuelling.

"The plane taxied onto the apron."

A protective or guiding plate or shield on a machine.

"The lathe's apron housed the feed mechanism."

The part of a theatre stage extending in front of the proscenium arch.

"The actor stepped out onto the apron."

A hard-surfaced area adjoining a road or railway, often for drainage.

"The road had a concrete apron along its edge."