'Semivowel' definitions:

Definition of 'semivowel'

From: WordNet
noun
A vowellike sound that serves as a consonant [syn: semivowel, glide]

Definition of 'Semivowel'

From: GCIDE
  • Semivowel \Sem"i*vow`el\, n. (Phon.) (a) A sound intermediate between a vowel and a consonant, or partaking of the nature of both, as in the English w and y. (b) The sign or letter representing such a sound. [1913 Webster]