1) Glide 2) Phone 3) Sound 4) Speech sound 1) Glide 
In phonetics and phonology, a semivowel (or glide) is a sound, such as English w or j, that is phonetically similar to a vowel sound but functions as the syllable boundary rather than as the nucleus of a syllable. ==Classification== Semivowels form a subclass of approximants. Although `semivowel` and `approximant` are sometimes treated as syno...
• (n.) A sound intermediate between a vowel and a consonant, or partaking of the nature of both, as in the English w and y. • (n.) The sign or letter representing such a sound.
A sound articulated in the same way as a vowel sound, but which functions like a consonant typically
Sem'i·vow`el noun (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. 
[n] - a vowel-like sound that serves as a consonant
A sound that is much like the vowel, but is not the key (nuclear) sound in a syllable. Examples
glide noun a vowellike sound that serves as a consonant