n a gradual decline (in size or strength or power or number)
n the outward flow of the tide
v flow back or recede
v hem in fish with stakes and nets so as to prevent them from going back into the sea with the ebb
v fall away or decline
n. 退潮( ebb的名词复数 ); 落潮; 衰退
v. （指潮水）退( ebb的第三人称单数 ); 落; 减少; 衰落