add on (to)
Definition of add on (to)
: to put (something) with another thing or group of things We're going to add on a new garage. We're adding a new garage on to our house. They're adding $200 on to what we already have to pay. We're adding a new garage onto our house.
Word by Word Definitions
: to join or unite so as to bring about an increase or improvement
: to say further : append
: to combine (numbers) into an equivalent simple quantity or number
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