There are two uses of square brackets (which, confusingly, Americans call simply brackets): to set off an interruption within a direct quotation [Churchill said of the Battle of Britain: “Never in the field of human conflict was so much owed by so many to so few [the Royal Air Force pilots]”.] to set off material […]
Operate = (1) direct or control something: Do you know how to operate this machinery? (2) perform surgery on (medicine): Have you heard what happened to the last patient he operated on? (3) to perform a function or work: The motor operates smoothly.The camera also operates underwater. (4) to be involved in military activities: A […]
A number of dots, usually three, which are used to show that something has been missed out from a sentence. They have two main uses:  To reduce the length of a quotation, and/or to cut it down to its essentials: Endearing anecdotes about the great man follow, the sort that ‘cling … to all […]