noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   A keyboard shortcut in Windows that completely closes the application or a focused window. countable, uncountable
2. 2
   An Internet meme involving novice users being tricked into closing applications. Internet, countable, uncommon, uncountable

Verb

1. 1
   To close or exit (a window or application) by pressing Alt-F4. Internet, intransitive, transitive

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.