Origin: Latin suffix -sion
Dimension has 8 different meanings across 2 categories:
the magnitude of something in a particular direction (especially length or width or height)
"The architect measured each room's dimensions to ensure they matched the design specifications perfectly."
one of three Cartesian coordinates that determine a position in space
"The engineer adjusted the x-dimension to ensure the new beam aligned perfectly within the three-dimensional grid."
A single aspect of a given thing.
"The new marketing campaign focused on just one dimension of our brand identity to avoid confusing customers."
In plain English: A dimension is a measurable direction or aspect used to describe the size, shape, or nature of something.
"The new sofa was too wide to fit through the doorway without measuring all the dimensions first."
Usage: Use dimension to describe a specific characteristic or feature that defines something, such as saying a job has high responsibility and low pay as its dimensions. Avoid using it to mean physical size or measurement unless you are specifically referring to length, width, height, or depth.
shape or form to required dimensions
"The carpenter adjusted the frame until it matched the exact dimensions specified in the architectural blueprint."
To mark, cut or shape something to specified dimensions.
"The carpenter carefully dimensioned each piece of lumber before assembling the new bookshelf."
In plain English: To dimension something means to measure its size and shape so you know exactly how big it is.
"The new software update will dimension your images to fit the smaller screen."
Usage: Use "dimension" as a verb when you are cutting, marking, or shaping an object to fit specific measurements, though this usage is technical and often replaced by simpler terms like "measure" or "size up" in casual conversation. Avoid using it to mean "improve" or "add depth," which are incorrect applications of the word's common noun forms.
The word dimension comes from the Latin dīmēnsiō, which originally meant a measuring or extent. It entered English through French to describe a measurable aspect of space or time.