(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.

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

plural of focus group

present participle of focus-group

Alternative spelling of focus group

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

simple past tense and past participle of focus-group

plural of focus-group (alternative spelling of focus groups).