self-closing /sɛlfˈkləʊzɪŋ/ adjective2 •Closing automatically after having been opened.Self-closing, spring-loaded, sliding doors are fitted to ensure that the coaches are draught-proof. — 1964 •In the form of (for example) `` or ``, without containing any content, as opposed to (for example) `text`, which is composed of an opening (``) and a closing (``) tag.