focusfocus2noun (no plural)special attention that is given to somebody or something: It was the main focus of attention at the meeting.in focus, out of focusIf a photograph is in focus, it is clear. If it is out of focus, it is not.focusfocusfocusesfocussesfocusedfocussedfocusingfocussing1verb (focuses, focusing, focused)1to give all your attention to something: to focus on a problem2to move part of a camera, etc. so that you can see things through it clearly