Noun

Singular focus

Plural countable and uncountable; plural foci or focuses

focus (countable and uncountable; plural foci or focuses)

1. (countable, optics) a point at which reflected or refracted rays of light converge.

   The heat of sunlight at the focus of a magnifying glass can easily set dry leaves on fire.

2. (countable, geometry) a point of a conic at which rays reflected from a curve or surface converge.
3. (uncountable, photography, cinematography) The fact of the convergence of light on the photographic medium.

   Unfortunately, the license plate is out of focus in this image.

4. (uncountable, photography, cinematography) The quality of the convergence of light on the photographic medium.

   During this scene, the boy’s face shifts subtly from soft focus into sharp focus.

5. (uncountable) concentration of attention.

   I believe I can bring the high degree of focus required for this important job.

6. (countable) the exact point of where an earthquake occurs, in three dimensions.

   The earthquake's focus was at exactly 37 degrees north, 18 degrees south, seventy five meters below the ground.

7. (computing) The indicator of the currently active element in a user interface.

   Text entered at the keyboard or pasted from a clipboard is sent to the component which currently has the focus.

Focus or FOCUS may refer to:

In science, mathematics or computing:

• Focus (optics), a point toward which light rays are made to converge
• Focus (earthquake), an earthquake's underground point of origin or hypocenter
• Focus (geometry), a special point used in describing conic sections
• Focus (linguistics), part of a sentence which contributes new or most important information
• Focusing, an activity related to psychotherapy

In computing

• Focus (computing), a component of the graphical user interface which is currently selected
• FOCUS, a domain-specific programming language for data handling and analysis
• FOCUS (hardware), a CPU architecture
• Helicon Focus, an image software program

In music:

• Focus (Stan Getz album), 1961 jazz album
• Focus (Cynic album), 1993 metal album
• Focus (band), 1970s Dutch band
• "Focus", a song by John Reuben
• "Focus", a song by Joe Budden

In writing:

• Focus (encyclopedia), a Swedish language encyclopedia
• Focus (German magazine), a German weekly newsmagazine
• Focus (Italian magazine), an Italian
• Focus (Christian magazine), a Christian magazine
• Focus (novel), a 1945 novel by Arthur Miller
  • Focus (film), a 2002 film of the novel
• BBC Focus, a monthly science and technology magazine

Other meanings:

• AGM-87 Focus, a U.S. Navy air-to-surface missile
• Ford Focus (international), international model of Ford Focus automobile
• Ford Focus (North America), North American model of Ford Focus automobile
• Focus (board game), an abstract strategy game
• Focus group, a form of qualitative research in which a group of people are asked about their attitude towards a product, service, concept, advertisement, idea, or packaging
• Focus mitt, a padded target attached to a glove and usually used in training boxers and other combat athletes
• Operation Focus, the Israeli name for the attack against the Egyptian Air Force in the Six-Day War.

Company and organizations:

• Focus (DIY), a UK chain of do-it-yourself stores
• FOCUS Brands, American restaurant franchiser and operator
• Focus Features, the art house films division of NBC Universal's Universal Studios
• Focus Films, U.K. independent film producer
• Focus Humanitarian Assistance, an international emergency relief organization
• Focus Ireland, Irish nonprofit organization providing services for homeless people
• FOCUS Program, a voluntary study program at numerous American universities
• Fellowship of Catholic University Students