/ ˈneɪzl; NAmE / adjective
1.
connected with the nose :
the nasal passages
a nasal spray
2.
( of sb's voice ) sounding as if it is produced partly through the nose :
a nasal accent
3.
( phonetics ) ( of a speech sound ) produced by sending a stream of air through the nose. The nasal consonants in English are /m/ , /n/ and /ŋ/, as in sum , sun and sung
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WORD ORIGIN
Middle English (in sense 2 of the noun): from medieval Latin nasalis , from Latin nasus nose.