• Closure (business), the process by which an organization ceases operations
• Closure (computer science), an abstraction binding a function to its scope
• Closure (philosophy), a philosophical description of the world put forward by Hilary Lawson
• Closure (psychology), the state of experiencing an emotional conclusion to a difficult life event, or, a point in the development of an artifact where social understanding and interpretation reaches consensus
• Closure (psychology, visual perception), the fact that peripheral vision tends to compress vision and to allow completion of details by already stored inner images
• Closure (visual arts), the process by which the mind fills in missing details of a framed object, as in the panels of a comic or a cinema/television screen
• Deductive closure, the application of the mathematical concept to formal logic
• Closure, also known as Cloture, is a motion in parliamentary procedure to bring debate to a quick end
• Law of Closure, a principle in Gestalt psychology
• Closure (law), an act of closing a public trial
• a stage in the social construction of technology
• Closure (statistical mechanics), a reduction from distribution function to fluid equations
• Poetic closure
• Transitive closure
• A packaging "closure" is a bottle cap or screw cap

In film:

• Straightheads, a movie staring Gillian Anderson that was released in the U.S. under the title Closure.

In mathematics:

• Closure (mathematics), the smallest object that both includes the object as a subset and possesses some given property
• Algebraic closure
• Closure (logic)
• Closure (topology), the set of all points intuitively "close to" a given set
• Kuratowski closure axioms

In music:

• Closure (video), a Nine Inch Nails video set
• Closure (band), a Canadian rock band
• "Closure" (Chevelle song), a song by Chevelle from their album Wonder What's Next
• "Closure", a song by Hood from their album Outside Closer
• "Closure", a song by Opeth from their album Damnation
• "Closure", a song by Aly & AJ from their album Insomniatic
• Resolution (music), in music theory