spirantPronunciation: /ˈspʌɪr(ə)nt/ PhoneticsDefinition of spirant adjective (of a consonant) uttered with a continuous expulsion of breath. noun a spirant consonant; a fricative. Derivatives spirantization noun spirantize (also spirantise) verb Origin: mid 19th century: from Latin spirant- 'breathing', from the verb spirarespirant in other Oxford dictionaries Definition of spirant in the US English dictionary