1con·cen·trate 
/ˈkɑ:nsənˌtreɪt/ verb
con·cen·trates; con·cen·trat·ed; con·cen·trat·ing /ˈkɑ:nsənˌtreɪt/ verb 1 [no obj] : to think about something : to give your attention to the thing you are doing, reading, etc.
▪ All that noise makes it hard to concentrate. ▪ The student has difficulty concentrating. — often + on ▪ All that noise makes it hard to concentrate on the book I'm trying to read. ▪ We need to concentrate [=focus] on this problem. ▪ We need to concentrate on finding ways to work more efficiently. ▪ He thought about becoming a lawyer, but he has decided to concentrate on a medical career instead. [=he has decided to direct his efforts toward a medical career instead] 2 [+ obj] : to cause (attention, efforts, strength, etc.) to be used or directed for a single purpose — usually + on ▪ She is concentrating her attention on her studies. [=she is giving her attention to her studies] ▪ We need to concentrate our efforts on finding ways to work more efficiently. 3 [+ obj] : to make (something, such as a liquid) stronger by removing water
▪ concentrate syrup ▪ The sauce should be simmered for a few minutes to concentrate its flavors.
▪ All that noise makes it hard to concentrate. ▪ The student has difficulty concentrating. — often + on ▪ All that noise makes it hard to concentrate on the book I'm trying to read. ▪ We need to concentrate [=focus] on this problem. ▪ We need to concentrate on finding ways to work more efficiently. ▪ He thought about becoming a lawyer, but he has decided to concentrate on a medical career instead. [=he has decided to direct his efforts toward a medical career instead]
▪ concentrate syrup ▪ The sauce should be simmered for a few minutes to concentrate its flavors.
concentrate the/your mind
◊Something that concentrates the/your mind makes you think very clearly.
▪ Working under a tight deadline can concentrate the mind wonderfully.
▪ Working under a tight deadline can concentrate the mind wonderfully.
