noun

the movement of the tide out to sea.

the tide was on the ebb

receding,going out,flowing back,retreat,retreating,drawing back,abating,subsiding,retrocession

verb

(of tidewater) move away from the land; recede.

the tide began to ebb

recede,go out,retreat,flow back,draw back,fall back,fall away,abate,subside,retrocede