For

For or FOR may refer to:

English language

 * For, a preposition
 * For, a complementizer
 * For, a grammatical conjunction

Science and technology

 * Fornax, a constellation
 * for loop, a programming language statement
 * Frame of reference, in physics
 * Field of regard, in optoelectronics
 * Forced outage rate, in reliability engineering

Other uses

 * Fellowship of Reconciliation, a number of religious nonviolent organizations
 * Fortaleza Airport (IATA airport code), an airport in Brazil
 * Revolutionary Workers Ferment (Fomento Obrero Revolucionario), a small left communist international
 * Fast oil recovery, systems to remove an oil spill from a wrecked ship
 * Field of Research, a component of the Australian and New Zealand Standard Research Classification
 * FOR, free on rail, a historic form of international commercial term or Incoterm
 * "For", a song by Dreamcatcher from Apocalypse: Save Us, 2022