柯林斯詞典envelope /??nv??l??p, ??n-/ (envelopes) 1. N-COUNT An envelope is the rectangular paper cover in which you send a letter to someone through the mail. 信封2. PHRASE If someone pushes the envelope, they do something to a greater degree or in a more extreme way than it has ever been done before. 挑戰(zhàn)極限; 突破常槼 There's a valuable place for fashion and design that pushes the envelope a bit. 突破點兒常槼的時尚和設計有其寶貴地位。 返回 envelope劍橋詞典a flat , usually square or rectangular , paper container for a letter 信封 範例 I folded the letter in half and put it in an envelope.Send a self-addressed envelope for our free catalogue .An envelope was waiting for me when I got home .Do you recognize the writing on the envelope?The teacher opened the sealed envelope containing the exam papers .習語on the back of an envelope 返回 envelope