n. The reflux or falling of the tide; the return of tide-water toward the sea: opposed to flood or flow. See tide.n. A flowing backward or away; decline; decay; a gradual falling off or diminution: as, the ebb of prosperity; crime is on the ebb.n. A name of the common bunting, Emberiza miliaria. Montagu.Not deep; shallow.To flow back; return, as the water of a tide, toward the ocean; subside: opposed to flow: as, the tide ebbs and flows twice in twenty-four hours. See tide.To return or recede; fall away; decline.Synonyms To recede, retire, decrease, sink, lower, wane, fall away.To cause to subside.