To concentrate during a task.
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 cause (rays of light, etc) to converge at a single point.
To aggregate figures of accounts.
The fact of the convergence of light on the photographic medium.
A point of a conic at which rays reflected from a curve or surface converge.
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 simplify or organize a process in order to increase its efficiency.
To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
To modernise.
On a weather chart, a line that is tangent to the flow of the wind.
A line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow.