Free from commotion. Of water: Having an unruffled surface, without waves or violent current; motionless or flowing imperceptibly.

Of a horizontal surface, as the ground, the sea, etc.: level, even, flat, free from elevations and depressions. Now regional (rare).

Of water, the sea, etc.: Not broken or turbulent; free from big waves or roughness; running or flowing evenly, calmly, or gently.

Calm, settled, still. Obsolete.

Free from agitation or disturbance; quiet, still, tranquil, serene; without wind, not stormy. literal of the weather, air, or sea.

Of the sea, a stream, etc.: free from rough waves or turbulence; smooth, calm; running calmly or gently.

Of water, etc.: (a) lustrous and transparent as glass; (b) having a surface like glass, smooth, unruffled. Hence also glassy calm, glassy quiet.

Of the sea or sky: Unruffled, tranquil. rare.

Without eddies, tranquil; also figurative.

Having no waves or undulation; not agitated or disturbed by waves. Also figurative.

Without foam; free from foam.

(un-, prefix1 affix 2.)

Without a ripple; free from ripples; calm. Also: without causing ripples.