[{"Bold_text": "noun", "List Items": ["a central point, as of attraction, attention, or activity:The need to prevent a nuclear war became the focus of all diplomatic efforts.Synonyms: nucleus , core , heart , center", "close attention or concentration:Some of the warning signs indicating you should pull over: drifting between lanes, repeated yawning, tailgating, and trouble maintaining focus.", "the ability to concentrate one’s attention or to sustain concentration:Mindfulness and meditation are often suggested to help manage stress, increase awareness of emotions, and improve focus.", "Physics.a point at which rays of light, heat, or other radiation meet after being refracted or reflected.", "Optics.the focal point focal pointof a lens, on which rays converge or from which they deviate.the focal length focal lengthof 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.", "the focal point focal pointof a lens, on which rays converge or from which they deviate.", "the focal length focal lengthof 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.", "Geometry.(of a conic section) a point having the property that the distances from any point on a curve to it and to a fixed line have a constant ratio for all points on the curve.", "Geology.the point of origin of an earthquake.", "Pathology.the primary center from which a disease develops or in which it localizes."]}, {"Bold_text": "verb (used with object)", "List Items": ["to bring to a focus or into focus; cause to converge on a perceived point:to focus the lens of a camera.", "to concentrate:to focus one's thoughts;to focus troop deployment in the east."]}, {"Bold_text": "verb (used without object)", "List Items": ["to be or become focused:My eyes have trouble focusing on distant objects.", "to direct one's attention or efforts:Students must focus in class."]}]