柯林斯詞典O /??/ (also o) (O's, o's) 1. N-VAR O is the fifteenth letter of the English alphabet. 英語字母表中的第15個字母2. SYMBOL for oxygen 氧元素[chem] 3. ABBREVIATION for offence 冒犯[AUSTRALIAN] [slang] 4. INTERJ →a variant spelling of oh 返回 o