fourth dimension

SEE SYNONYMS FOR fourth dimension ON THESAURUS.COM

noun

Physics, Mathematics. a dimension in addition to length, width, and depth, used so as to be able to employ geometrical language in discussing phenomena that depend on four variables: Time is considered a fourth dimension for locating points in space-time.
something beyond the kind of normal human experience that can be explained scientifically: The story deals with ESP and other excursions into the fourth dimension.

Origin of fourth dimension

First recorded in 1870–75

OTHER WORDS FROM fourth dimension

fourth-di·men·sion·al, adjective

Words nearby fourth dimension

fourth, fourth amendment, fourth class, fourth commandment, fourth cranial nerve, fourth dimension, fourth disease, fourth estate, fourth heart sound, fourth international, fourth of july

Words related to fourth dimension

time, continuum, space-time

British Dictionary definitions for fourth dimension

fourth dimension

noun

the dimension of time, which is necessary in addition to three spatial dimensions to specify fully the position and behaviour of a point or particle
the concept in science fiction of a dimension in addition to three spatial dimensions, used to explain supernatural phenomena, events, etc

Derived forms of fourth dimension

fourth-dimensional, adjective

Scientific definitions for fourth dimension

fourth dimension
[ fôrth ]

Time regarded as a coordinate dimension. A fourth dimension is required by relativity theory, along with three spatial dimensions, to specify completely the location of any event.