(astronomy) The velocity of a star relative to the Sun

A journalist or other writer who is paid by the column inch.

White area between written characters and graphic regions on a produced page or computer display; blanks and the vertical blank lines in between paragraphs, or other organized rows of text lines (poetry).

(topology, formally) An ordered pair (X, τ), where X is a set and τ, called the topology, is a collection of subsets of X which satisfies certain axioms and whose elements are called the open sets (or alternatively, for a different set of axioms, the closed sets);

(mathematics) A subset of Euclidean space in which tensors are used to describe distance, angle, and curvature

A narrow opening underneath the bottom of a building (or storey) used to give access to pipes, cables and other utilities

Any activity performed by an astronaut outside of a space vehicle in space.

(uncountable) The application of science and engineering to the exploration and utilization of outer space / (countable) Any particular scientific or engineering discipline used in this field

(uncountable) Flight into, from or through space. / (countable) A voyage in space.

(mathematics) A vector space whose basis of real numbers has three vectors