The dividing line or location between two areas.
An edge or line marking an edge of the playing field.
The bounds, confines, or limits between immaterial things (such as one’s comfort zone, privacy, or professional sphere and the realm beyond).
An event whereby the ball is struck and either touches or passes over a boundary (with or without bouncing), usually resulting in an award of 4 (four) or 6 (six) runs respectively for the batting team.
(of a set) The set of points in the closure of a set S, not belonging to the interior of that set.
A point of a conic at which rays reflected from a curve or surface converge.
The fact of the convergence of light on the photographic medium.
The most important word or phrase in a sentence or passage, or the one that imparts information.
The quality of the convergence of light on the photographic medium.
A point at which reflected or refracted rays of light converge.
The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).
The status of being the currently active element in a user interface, often indicated by a visual highlight.
Concentration of attention.
An object used in casting a magic spell.
To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
To transfer the input focus to (a visual element), so that it receives subsequent input.
To direct attention, effort, or energy to a particular audience or task.
To concentrate one’s attention.
To concentrate during a task.
To cause (rays of light, etc) to converge at a single point.
To aggregate figures of accounts.