/ daɪˈmenʃn; NAmE ; dɪ-/ noun
1.
a measurement in space, for example the height, width or length of sth :
We measured the dimensions of the kitchen.
computer design tools that work in three dimensions
—see also the fourth dimension
2.
[ usually pl. ] the size and extent of a situation :
a problem of considerable dimensions
3.
an aspect, or way of looking at or thinking about sth :
Her job added a new dimension to her life.
the social dimension of unemployment
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WORD ORIGIN
late Middle English (in sense 1): via Old French from Latin dimensio(n-) , from dimetiri measure out. Sense 2 dates from the 1920s.