dimensionless adjective. [dɪ'mɛnʃ(ǝ)nlǝs, dʌɪ-] M17.
[from DIMENSION noun + -LESS.]
1. Having no spatial extent; extremely minute. M17.

2. Measureless, immense. E19.

3. Having none of the three dimensions of space. M19.
b. Of a physical quantity or its unit: having no dimensions; of the nature of a pure number, with a value independent of the choice of other units. E20.

[TahlilGaran] English Dictionary ▲