focus

Definitions

• (countable) A point at which reflected or refracted rays of light converge.
• (countable) A point of a conic at which rays reflected from a curve or surface converge.
• (uncountable) The fact of the convergence of light on the photographic medium.
• (uncountable) The quality of the convergence of light on the photographic medium.
• (uncountable) Concentration of attention.
• (countable) The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).
• (GUI) The indicator of the currently active element in a user interface.
• (linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.
• An object used in casting a magic spell.