Any small, rounded object used for fastening or ornamenting a garment.

钮扣。

A pivoted fastening for a door, window, etc.

(门、窗的)枢钮。

A small knob operating a switch in an electric circuit.

电钮。

Any small, rounded object, as the bud of a plant.

小圆状物(如芽苞)。

Young mushroom.

初生的蕈。

Point of the jaw.

【俚】(拳击)下巴尖。

To fasten or furnish with buttons.

扣紧钮；装钮扣；用扣子钉住。

To be capable of being fastened by buttons.

可以扣紧。