# Transition

Transition or transitional may refer to:

## Mathematics, science, and technology
### Biology

* Transition (genetics), a point mutation that changes a purine nucleotide to another purine (A ↔ G) or a pyrimidine nucleotide to another pyrimidine (C ↔ T)
* Transitional fossil, any fossilized remains of a lifeform that exhibits the characteristics of two distinct taxonomic groups
* A phase during childbirth contractions during which the cervix completes its dilation

### Gender and sex

* Gender transition, the process of changing one's gender presentation to accord with one's internal sense of one's gender – the idea of what it means to be a man or woman
* Gender-affirming therapy, the physical aspect of a gender transition
** Gender-affirming surgery, surgical intervention a part of medical gender affirmation

### Physics

* Phase transition, a transformation of the state of matter; for example, the change between a solid and a liquid, between liquid and gas or between gas and plasma
* Quantum phase transition, a phase transformation between different quantum phases
* Quantum Hall transitions, a quantum phase transition that occurred because of the quantum Hall effect
* Transition radiation, contrasts to the Cherenkov radiation
* Atomic electron transition, the transition of an electron from one quantum state to another within an atom
* Beta decay transition, nuclear beta decay determined by changes in spin
* Laminar–turbulent transition, the process of a laminar fluid flow becoming turbulent
* Glass transition, the reversible transition in amorphous materials
* Lambda transition, universality class in condensed matter physics

### Chemistry

* Transition metal, either an element whose atom has an incomplete d sub-shell, or any element in the d-block of the periodic table
* Transition state, of a chemical reaction is a particular configuration along the reaction coordinate
* SRM transition, the precursor and product ion pair in Selected reaction monitoring (SRM) in analytical chemistry

### Computing

* A movement between states of an abstract computer, described by a transition system
* A phase of the project lifecycle in the Rational Unified Process
* A paradigm describing changes of communication mechanisms, see Transition (computer science)

### Other uses in technology

* Transitions, a brand of photochromic eyeglass lens and sponsor of the PGA Tour Transitions Championship
* Transition (roadable aircraft), a flying car (or drivable airplane) made by Terrafugia
* "Shifting gears" on a railroad locomotive; see Diesel locomotive#Propulsion system operation

## Government and politics

* Democratic transition
* Transition management (governance)
* Social change, often synonymous with social transition
* Peaceful transition of power a norm or practice in democratic governments, of transitions of power between different political parties
* United States presidential transition, the transfer of federal executive branch power from the incumbent President of the United States to the president-elect
* Brexit withdrawal agreement#Transition period

## Arts and entertainment
### Literature

* Transition (fiction), a narrative element or general aspects of writing style that signal changes in a story
* Transition (linguistics), a certain word, expression, or other device that gives text or speech greater cohesion by making it more explicit

#### Works

* Transition (literary journal), an experimental literary journal that featured surrealist, expressionist, and Dada art and artists
* Transition (novel), a novel by Iain Banks
* Transitions (novel series), a novel series by R A Salvatore
* Transition Magazine, a political and literary journal published from 1961 to 1976 on the African continent, and revived in 1991 in the United States
* Transitions Online, Czech publisher of the Transitions news journal
* Transition, a novel by Vonda N. McIntyre 1990

### Film, radio, and television

* Film transition, a method of juxtaposing two scenes, including:
** Wipe (transition), a type of film transition where one shot replaces another by travelling from one side of the frame to another or with a special shape
** Dissolve (filmmaking), a gradual transition from one image to another
* Transitions (film), the world's first IMAX film in 3D
* Transition (1989 film), a film by the Iranian director Kamal Tabrizi
* Transition (2023 film), a documentary film
* Transitions (radio show), a weekly two-hour radio show on Kiss 100 in the UK
* "Transitioning" (Glee), an episode of US television series Glee
* "Transitions" (Law & Order: Special Victims Unit episode), an episode of US television series Law & Order: Special Victims Unit
* "Transition" (The West Wing), an episode of US television series The West Wing
* "Transitions" (The Wire), an episode of US television series The Wire
* "Transitions", an episode of US television series Without a Trace

### Music

* Transition (music), the middle passage of a piece of music
* Transition (band), English indie rock band

#### Albums

* Transition (John Coltrane album), 1970
* Transition (The First Edition album), 1971
* Transition (Buddy Rich Lionel Hampton album), 1974
* Transition (John Miles album), 1985
* Transition (Fly to the Sky album), 2006
* Transition (Ryan Leslie album), 2009
* Transition (Chipmunk album), 2011
* Transition (Steve Lukather album), 2013
* Transitions (John Digweed album), 2006
* Transitions (Aghora album), 2006
* Transitions (Westbound Train album), 2006
* Transitions (EP), 2010 by Canadian post-hardcore band Silverstein

#### Songs

* "Transition", by Pestilence from Obsideo, 2013
* "Transition", by Theatre Of Tragedy from Forever Is the World, 2009
* "The Transition", by Hawthorne Heights from The Silence in Black and White, 2004
* "Transitions", by Beastie Boys from Ill Communication, 1994
* "Transitions", by Zao from The Crimson Corridor, 2021

### Other arts

* Transitional Style, of furniture and interior design

## Sport

* Transition (grappling), in grappling is a move from one grappling hold or grappling position to another
* Transitions Championship, a men's professional golf tournament on the PGA Tour

## Other uses

* Transition Glacier, a glacier on the east coast of Alexander Island
* Care transition, wherein a patient changes health care provider