- A continuous series or whole, no part of which is noticeably different from its adjacent parts, although the ends or extremes of it are very different from each other.
- A continuous extent.
- (mathematics) The set of all real numbers and, more generally, a compact connected metric space.
- (music) A touch-sensitive strip, similar to an electronic standard musical keyboard, except that the note steps are 1⁄100 of a semitone, and so are not separately marked.
the set of real numbers