1. backtab - Noun
2. backtab - Verb
(computing, uncountable) A software-defined key combination to do the reverse of pressing the Tab key, usually Shift+Tab.
(computing, countable) An instance of pressing this key combination.
backtab (third-person singular simple present backtabs, present participle backtabbing, simple past and past participle backtabbed)
(computing, intransitive) To press this key combination.