Definition of fluctuant in English:

fluctuant

adjective

literary, technical
  • Fluctuating; unstable.

    • ‘What matters is their interpretability, the meanings they attract, their fluctuant interpretive magnetism.’
    • ‘From where he lay on the end of the dock, the river was like fluctuant diamond-paned glass of two colors, olive green and steel blue, leaded together by wavering white stitches of sun.’
    unpredictable, changeable, variable, inconstant, inconsistent, uncertain, erratic, irregular, unstable, turbulent, unsteady, unsettled, unreliable, undependable, changing, ever-changing, varying, shifting, fluctuating, fluid, mutable, protean, fitful, wavering, full of ups and downs
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Origin

Mid 16th century: from Old French ‘undulating’, from Latin fluctuare ‘undulate’.

Pronunciation

fluctuant

/ˈflʌktjʊənt/