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*A straight line has one dimension, a parallelogram has two dimensions, and a parallelepiped has three dimensions.*- a property of space; extension in a given direction:A straight line has one dimension, a parallelogram has two dimensions, and a parallelepiped has three dimensions.
- the generalization of this property to spaces with curvilinear extension, as the surface of a sphere.
- the generalization of this property to vector spaces and to Hilbert space.
- the generalization of this property to fractals, which can have dimensions that are noninteger real numbers.
- extension in time:Space-time has three dimensions of space and one of time.
- Usually,
*the dimensions of a problem.* - measurement in length, width, and thickness.
- scope; importance:the dimensions of a problem.
- unit (def. 6).
- magnitude; size:
*Matter has dimension.* - a magnitude that, independently or in conjunction with other such magnitudes, serves to define the location of an element within a given set, as of a point on a line, an object in a space, or an event in space-time.
- the number of elements in a finite basis of a given vector space.
- any of a set of basic kinds of quantity, as mass, length, and time, in terms of which all other kinds of quantity can be expressed; usually denoted by capital letters, with appropriate exponents, placed in brackets:[LT]. Cf. dimensional analysis.
*The dimensions of velocity are* - the measurements of a woman's bust, waist, and hips, in that order:
*The chorus girl's dimensions were 38-24-36.* - See

- to shape or fashion to the desired dimensions:
*Dimension the shelves so that they fit securely into the cabinet.* - to indicate the dimensions of an item, area, etc., on (a sketch or drawing).

- dimension (Thesaurus)