noun, plural fo·cus·es, fo·ci [foh-sahy, -kahy] /ˈfoʊ saɪ, -kaɪ/.
- the focal point of a lens, on which rays converge or from which they deviate.
- the focal length of a lens; the distance from a focal point to a corresponding principal plane.
- the clear and sharply defined condition of an image.
- the position of a viewed object or the adjustment of an optical device necessary to produce a clear image: in focus; out of focus.
verb (used with object), fo·cused, fo·cus·ing or (especially British) fo·cussed, fo·cus·sing.
verb (used without object), fo·cused, fo·cus·ing or (especially British) fo·cussed, fo·cus·sing.
- foch, ferdinand,
- focus group,
- focus puller,
- focused strategy,
- focusing cloth
Origin of focus
Examples from the Web for focussed
He took a piece of punk from a waterproof box that he carried in his pocket and focussed the sun's rays on it.The Land of the Changing Sun|William N. Harben
Our gunners had focussed on these, and they gave them a good pasting.Bullets & Billets|Bruce Bairnsfather
Some sinister and definitely malignant intelligence was focussed upon him; or was this a chimera of his imagination?The Yellow Claw|Sax Rohmer
That agencies inimical to your safety are focussed upon the house your own statement amply demonstrates.Bat Wing|Sax Rohmer
Wilmot drew a long breath, focussed his mind upon bright memories of Barbara, and slowly nodded.The Penalty|Gouverneur Morris
noun plural -cuses or -ci (-saɪ, -kaɪ, -kiː)
verb -cuses, -cusing, -cused, -cusses, -cussing or -cussed
Word Origin for focus
1640s, from Latin focus "hearth, fireplace" (also, figuratively, "home, family"), of unknown origin, used in post-classical times for "fire" itself, taken by Kepler (1604) in a mathematical sense for "point of convergence," perhaps on analogy of the burning point of a lens (the purely optical sense of the word may have existed before Kepler, but it is not recorded). Introduced into English 1650s by Hobbes. Sense transfer to "center of activity or energy" is first recorded 1796.
1775 in the literal sense; 1807 in the figurative sense, from focus (n.). Related: Focused; focusing; less commonly focussed; focussing.