Definition of tideless in US English:

tideless

adjective

  • See tide

    • ‘The seas around Malta are virtually tideless and currents are very rare in summer.’
    • ‘Many seas are tideless, and the waters of some are saline only in a very slight degree.’
    • ‘Like everything else in the picture, the water on which the barge floats is serene and unruffled, as in a tideless sea or lagoon.’
    • ‘In the Prime Minister's mental landscape Britain's economy is a tideless sea.’

Pronunciation

tideless

/ˈtaɪdləs//ˈtīdləs/