The episode "The Sound of Her Voice" from the sixth season of Star Trek: Deep Space Nine features a shuttlecraft named the Chaffee assigned to the USS Defiant.
WarpOS had two housekeeping tasks named Defiant and Babylon5, thought to be named after the USS Defiant from Star Trek DS9 and Babylon 5, its developers being science fiction fans.
USS Monitor | USS Constitution | USS ''Constitution'' | Boulton Paul Defiant | USS Defiant | USS ''Monitor'' | USS Enterprise (NCC-1701) | USS Cole bombing | USS New Ironsides | USS Merrimack | USS Enterprise (CV-6) | USS ''Enterprise'' | USS ''Somers'' | USS Quincy (CA-71) | USS Quincy | USS Pueblo | USS ''Nautilus'' | USS ''Merrimac'' | USS ''Lexington'' | USS ''Kearsarge'' | USS Enterprise (NCC-1701-D) | USS Enterprise (NCC-1701-B) | USS Enterprise | USS ''Defiant'' | USS Brooklyn | USS Voyager | USS ''Vincennes'' | USS ''Truxtun'' | USS San Jacinto (1850) | USS Saipan |
Having just come through the wormhole in the closing moments of the previous episode, the Dominion fleet momentarily pauses and faces off with DS9, USS Defiant, several runabouts, and Gul Dukat aboard a Bird of Prey.
In Pocket Books' non-canon DS9 Relaunch novels, Ezri remains on Deep Space Nine but moves from counseling to command, receiving a promotion to lieutenant and becoming executive officer of the USS Defiant.