A near-close vowel or a near-high vowel is any in a class of vowel sound used in some spoken languages. The defining characteristic of a near-close vowel is that the tongue is positioned similarly to a close vowel, but slightly less constricted. Near-close vowels are sometimes described as lax variants of the fully close vowels.
The near-close vowels that have dedicated symbols in the International Phonetic Alphabet are:
There also are close vowels that don't have dedicated symbols in the IPA:
(IPA letters for rounded vowels are ambiguous as to whether the rounding is protrusion or compression. However, transcription of the world's languages tends to pattern as above.)