(countable, optics) A point at which reflected or refracted rays of light converge. / (countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.

(intransitive, followed by on or upon) To concentrate during a task. / (transitive) To direct attention, effort, or energy to a particular audience or task.

(of an image) Sharp and clear with no fuzziness. / (idiomatic, of one's thoughts) Clearly perceived.

(film, television) A filming technique whereby the focal point is drawn towards the viewer; also a shot (as part of an edit) in which such a technique is used. Also used attributively.

(photography) The blur produced by spherical aberration in a lens, sometimes deliberately used to produce a dreamy effect or to eliminate blemishes.

A group of people, sampled from a larger population, interviewed in open session for market research or political analysis.

present participle of focus-group

To subject ideas to review by a focus group in order to determine the viability of those ideas.

Alternative spelling of focus group

simple past tense and past participle of focus-group