vowel noun
ADJ. long, short | open | neutral This neutral vowel is known as ‘schwa’. | weak | broad, flat | final | accented, stressed | unaccented, unstressed
VERB + VOWEL begin with, contain, end in/with
VOWEL + NOUN sound | system
You can also check other dicts: vowel (English, 中文解释 ), wordnet sense, Collins Definition