noun one of the nasal bones.
2. nasal ·adj of or pertaining to the nose.
3. nasal ·noun a plate, or scale, on the nose of a fish, ·etc.
4. nasal ·noun part of a helmet projecting to protect the nose; a nose guard.
5. nasal ·noun a medicine that operates through the nose; an errhine.
6. nasal ·noun an elementary sound which is uttered through the nose, or through both the nose and the mouth simultaneously.
7. nasal ·adj having a quality imparted by means of the nose; and specifically, made by lowering the soft palate, in some cases with closure of the oral passage, the voice thus issuing (wholly or partially) through the nose, as in the consonants m, n, ng (see guide to pronunciation, // 20, 208); characterized by resonance in the nasal passage; as, a nasal vowel; a nasal utterance.