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(countable, optics) A point at which reflected or refracted rays of light converge.
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(countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.
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(uncountable, photography, cinematography) The fact of the convergence of light on the photographic medium.
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(uncountable, photography, cinematography) The quality of the convergence of light on the photographic medium.
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(uncountable) Concentration of attention.
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(countable) Something to which activity, attention or interest is primarily directed.
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(countable, seismology) The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).
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(graphical user interface) The status of being the currently active element in a user interface, often indicated by a visual highlight.
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(linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.
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An object used in casting a magic spell.
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(ichthyology) The centre of an older fish's scale, which is the point where a younger fish's scale starts to grow from.