#1 spirant n. [fricative consonant, fricative] a continuant consonant produced by breath moving against a narrowing of the vocal tract. wn
#2 spirant s. [fricative, continuant, sibilant, strident] of speech sounds produced by forcing air through a constricted passage (as 'f', 's', 'z', or 'th' in both 'thin' and 'then'). wn
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