1. the rounded or projecting edges of stair treads that extend beyond the risers
Usage: architecture; construction
2. protective strips or moldings applied to the edges of steps or platforms
Usage: construction

Examples

• The carpenter installed rubber nosings on each step for safety.
• Metal nosings help prevent wear on the stair edges.
• The building code requires nosings to extend at least three-quarters of an inch.
• Anti-slip nosings were added to the outdoor stairs.
• The nosings on the marble steps had worn smooth over time.
• Yellow nosings were painted on the steps to improve visibility.