tidal

adjective

tid·​al ˈtī-dᵊl 

1

a

: of, relating to, caused by, or having tides

tidal cycles

tidal erosion

b

: periodically rising and falling or flowing and ebbing

tidal waters

2

: dependent (as to the time of arrival or departure) upon the state of the tide

a tidal steamer

tidally

ˈtī-dᵊl-ē 

adverb

Examples of tidal in a Sentence

Recent Examples on the Web

Water movement has carved patterns into the tidal flats, creating a transition from warm golden tones to cool teal waters. — Cecilia Rodriguez, Forbes.com, 23 Aug. 2026

In Wilmington, officials are looking into why a couple of polluted tidal creeks in the area are struggling to recover despite restoration efforts. — Dinah Voyles Pulver, USA Today, 21 Aug. 2026

In Maine, DeepGreen Western Passage has proposed a submersible AI data center in the Bay of Fundy, powered by tidal turbines designed to harness the area’s strong tidal currents. — Nir Kshetri, The Conversation, 17 Aug. 2026

That tidal flexing generates enormous internal heat, keeping parts of Io’s interior molten and driving its extraordinary volcanism. — Kaif Shaikh, Interesting Engineering, 11 Aug. 2026

Word History

First Known Use

1807, in the meaning defined at sense 1a

Phrases Containing tidal

• tidal wave

Rhymes for tidal

• bridal
• bridle
• idle
• idol
• idyll
• seidel
• sidle
• widal
• apsidal
• subtidal
• bactericidal
• insecticidal

Kids Definition

tidal

adjective

tid·​al ˈtīd-ᵊl 

: of or relating to tides : rising and falling or flowing and ebbing at regular times

Medical Definition

tidal

adjective

tid·​al ˈtīd-ᵊl 

: of, relating to, or constituting tidal air

interference with the normal tidal exchange of the lungs

—F. R. Mautz & R. M. Hosler