To type (or format) text without leaving a blank line between each line of text. / To type (or format) text with only one space between consecutive sentences.

Sufficient space or a span of time in which to recover one's breath. / A rest, pause, or respite. / Enough distance so that one can feel unfettered.

That part of an electron tube in which electrons interact with a modulated field

(mathematics) Any metric space whose elements are functions

Alternative spelling of spacelike

(mathematical analysis) A measurable space which has a positive measure defined on its σ-algebra.

Any defensive measure against an attack by missiles etc while in space

(astronomy) The real or apparent motion of a star etc. through space.

(mathematics) The path traced by the instantaneous centre of a rotating three-dimensional body moving relative to an inertial frame of reference

A blanket made of a plastic material covered with a reflective metal agent; designed to reduce heat loss from a person's body following trauma, or used on the exterior of a spacecraft for thermal control.