noun \ˈtīd\

: the regular upward and downward movement of the level of the ocean that is caused by the pull of the Sun and the Moon on the Earth

: the flow of the ocean's water as the tide rises or falls

: the way in which something is changing or developing

Full Definition of TIDE

a obsolete :  a space of time :  period
b :  a fit or opportune time :  opportunity
c :  an ecclesiastical anniversary or festival; also :  its season —usually used in combination <Eastertide>
a (1) :  the alternate rising and falling of the surface of the ocean and of water bodies (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 (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 1
a :  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>
a :  a flowing stream :  current
b :  the waters of the ocean
c :  the overflow of a flooding stream
tide·less \-ləs\ adjective

Examples of TIDE

  1. a chart of the tides
  2. The boat got swept away in the tide.

Origin of TIDE

Middle English, time, from Old English tīd; akin to Old High German zīt time and perhaps to Greek daiesthai to divide
First Known Use: before 12th century

Other Oceanography Terms

littoral, sound



Definition of TIDE

intransitive verb
:  to flow as or in a tide :  surge
transitive verb
:  to cause to float with or as if with the tide

First Known Use of TIDE



intransitive verb

Definition of TIDE

:  betide, befall

Origin of TIDE

Middle English, from Old English tīdan; akin to Middle Dutch tiden to go, come, Old English tīd time
First Known Use: before 12th century


noun \ˈtīd\   (Medical Dictionary)

Medical Definition of TIDE

:  a temporary increase or decrease in a specified substance or quality in the body or one of its systems <a postprandial alkaline tide, the typical rise in urinary pH associated with gastric acid secretion—E. J. Jacobson & Gerhard Fuchs>
May 30, 2015
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