(regular expressions) A grouping in a regular expression that doesn't store the value it matches (symbol: ?:).

(UK, politics) A Eurosceptic/pro-Brexit publicly funded political activist group subdivision of the UK Conservative Pary founded in 1992.

plural of group representation constituency

(Singapore, politics) A type of parliamentary constituency with multiple representatives from the same political group, at least one of whom must be from an ethnic minority.

(astronomy) A collection of galaxies designated as published by Paul Hickson in 1982.

(military) A military unit of the armed forces which incorporates multiple branches of the military within a single command structure (also known as combined arms).

(topology) A topological group whose underlying topology is both locally compact and Hausdorff.

(algebraic geometry) A group which is an analogue for schemes of the fundamental group for topological spaces.

(dated, psychotherapy) A small encounter group meeting in a private home.

(psychology) (abbreviated LGAT) Activities usually offered by groups linked with the human potential movement which claim to increase self-awareness and bring about desirable transformations in individuals' personal lives.