Definition of undulant in US English:



  • Having a rising and falling motion or appearance like that of waves; undulating.

    • ‘The tablets have the same dimensions, the same undulant surfaces and similar colors, but they are entirely different in tactility and visual weight.’
    • ‘I fin out into the undulant, pellucid sea to ‘just look.’’
    • ‘Untreated, the fever becomes undulant (up for weeks and gone for weeks), patients spend three months in the hospital and 2% die.’
    undulating, surging, heaving, tossing, rippling, rising and falling, swelling
    View synonyms


Mid 19th century: from Latin undulant- ‘moving like a wave’, from the verb undulare.