Sofa cover.
2.[ cliche; By convention]: If you are entertaining.
3. [cotton pad; Cotton wool] [square]: Cotton wool is in the quilt.
Cotton condoms.
4. [Cycle; Noose]: A ring made of rope.
5. [Convention; Formula]: Fixed format and method.
6.[ Ricardo] 20 13 The annual new invention of the US Department of Defense, which was madly transmitted on foreign video websites, is a bulletproof stealth suit called "condom". The explanation in China can be translated as "the stronger the better". It was taken in a shabby house called "5 17" in Jiangxia District, Wuhan. Details can be found on Wikipedia: Condon.