tide

1a(1) : the alternate rising and falling of the surface of the ocean and of water bodies (such as gulfs and bays) connected with the ocean that occurs usually twice a day and is the result of differing gravitational forces exerted at different parts of the earth by another body (such as the moon or sun)

(2) : a less marked rising and falling of an inland body of water

(3) : a periodic movement in the earth's crust caused by the same forces that produce ocean tides

(4) : a periodic distortion on one celestial body caused by the gravitational attraction of another

(5) : one of the periodic movements of the atmosphere resembling those of the ocean and produced by gravitation or diurnal temperature changes

b : flood tide sense 1

2a : something that fluctuates like the tides of the sea the tide of public opinion

b : a large and increasing quantity or volume a tide of opportunists a swelling tide of criticism

3a : a flowing stream : current

b : the waters of the ocean

c : the overflow of a flooding stream

4a : a fit or opportune time : opportunity

b : an ecclesiastical anniversary or festival also : its season —usually used in combination Eastertide

c obsolete : a space of time : period

Definition of tide

WORD OF THE DAY