A cell is a single unit or compartment, enclosed by a border or wall. As a term, cell has become a general-purpose metaphor for building blocks which serve to compose larger structures.

In science:

• Cell (biology), the smallest metabolically-functional unit of life; see List of topics in cell biology
• Cell (journal), a bi-monthly peer-reviewed scientific journal related to biology
• Electrochemical cell, a setup used for creating an electromotive force
• Cell (geometry), in Euclidean geometry, refers to a 3-dimensional facet in a polytope
• A cellular automaton is a mathematical model consisting of a grid of cells whose states are changed according to a set of rules
• A part of the wing of an insect, surrounded by veins. Often important in determination of species

In technology:

• Cell microprocessor, a microprocessor developed jointly by IBM, Toshiba, and Sony
• A cellular architecture is a type of computer architecture
• Memory cell, in computer science, a building block of computer memory
• Cell (spreadsheet), a component part of a spreadsheet defined by its row & column (eg. "A1")
• Cell, (radio communications), a small geographic area of radio coverage served by a cell site (radio tower and equipment).
• Cell phone, a mobile phone for communicating through a cell site.

In buildings:

• A prison cell, a room used to hold people in prisons
  • Kishka (prison cell), a type of prison cell in Russia
• A hermitage
• U.S. Cellular Field, aka "The Cell", a baseball stadium in Chicago, Illinois.

In arts:

• Cell (music), a rhythmic, melodic, motivic, or intervallic group, set, or figure
• The Cell, a film starring Jennifer López
• Cell (novel), by Stephen King
• Cell (Dragon Ball), a fictional character in Dragon Ball and Dragon Ball Z

• Cell (band), a rock band
• The Cells, a rock band
• Cell (Alexandre Scheffer), electronic music composer

In politics:

• Covert cell, a small, secret group organized to resist penetration by an opposing organization

Celle | Zelle | célula | Ĉelo | cellule | Cel | Celle (andre betydninger) | komórka | Bunka | Ћелије | cell