firebox.

The chamber in a stove, furnace, boiler, or fireplace where fuel burns.

Use it for

Words that belong together

• stove firebox
• firebox door

On the page

The firebox door glowed at its edges.

Ash filled the stove’s firebox.

The repairer inspected the damaged firebox.

Usage notes

Primary category: architecture. Forms: Singular firebox; plural fireboxes. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.