verb 1. (to cause a characteristic of something) to change, often slightly
I took the coat back to the shop to have it altered. [T]
We've had to alter some of our plans. [T]
The waiter apologized and altered the figure on the bill. [T]
Although long-distance phone calls are going up, the charge for local calls will not alter. [I]
Giving up our car has radically altered our lifestyle. [T]
alteration
noun Several police officers are being questioned about the alteration of the documents. [U]
The house needed extensive alterations when we moved in. [C]
Some alterations to our original plans might be necessary. [C]