1. A knob or button, especially a rounded protuberance or ornamental knob on furniture or architecture.
Usage: archaic or dialectal; chiefly British
2. A bud or knot on a plant or tree.
Usage: archaic; botanical

Examples

• The old cabinet had brass knops on each drawer.
• She turned the knop to open the heavy wooden door.
• The decorative knops adorned the corners of the bedframe.
• The tree's knops began to swell in early spring.
• Medieval architecture often featured ornamental knops on pillars.