Notion or Notions may refer to:
Software Notion (music software), a music composition and performance program Notion (productivity software), a note-taking and project-management program from Notion Labs, Inc. Notion (window manager), the successor to the Ion window manager
Music Notion (EP), by Tash Sultana, 2016 "Notion" (Kings of Leon song), 2008 Notion (magazine), a UK music and fashion quarterly Notion (music software), a music composition and performance program "Notion" (Tash Sultana song), 2016 "Notion" (The Rare Occasions song), 2016
Other uses Johnnie Notions, Shetland smallpox inoculator Notion (ancient city), a Greek city-state on the west coast of Anatolia Notion, ancient name of Mizen Head in Ireland Notion (philosophy), a reflection in the mind of real objects and phenomena in their essential features and relations Notions (sewing), small articles used in sewing and haberdashery Notions (Winchester College), the Winchester slang