Holdfast most often refers to:
Holdfast (biology), a root-like structure that anchors aquatic sessile organisms to their substrate Holdfast (tool), a tool used to secure a workpiece to a workbench or anvil
Holdfast or hold fast may also refer to:
Places Holdfast, Worcestershire, a village in the Malvern Hills District in England Holdfast, Saskatchewan, a village in Canada
Arts and entertainment Music Hold Fast (album), a 2012 album, or the title song, by the Crookes Hold Fast: Acoustic Sessions, a 2018 album by Face to Face Hold Fast, a 2020 album by Stick in the Wheel "Hold Fast" (song), a 2006 song by MercyMe "Hold Fast", a 2010 song by Honor Bright from Action! Drama! Suspense!
Other media Hold Fast, a travel documentary film by Moxie Marlinspike Holdfast: Nations at War, a video game set during the Napoleonic Wars; see Napoleonic Wars in fiction
Other uses Hold Fast, the motto of the Clan MacLeod Holdfast, a common name in the South of England for Sellotape Holdfast (artillery), a plinth or pedestal to which an anti-aircraft or coastal battery gun was fitted Codename for the 1962 Ceylonese coup d'état attempt
See also Avast (disambiguation), a cognate of hold fast Holdfast Bay (disambiguation)