Double means two times more than one. It is used to say there is twice the amount or number of something.
She ate a double sandwich today.
I have a double portion of rice.
As a verb, double means to make something two times bigger or more. You can double a number, amount, or size.
We doubled the recipe for the party.
He doubled his money quickly.
A double is a person or object that looks very like another one. It means an exact copy or a look-alike.
He saw his double in the mirror.
The movie has a stunt double actor.
In film and TV, to double means to add voices or sounds over the original recording, often in a different language.
They doubled the movie in English.
She doubles films for TV shows.
In hotels, a double is a room made for two people. It usually has one big bed or two small beds.
We booked a double for our trip.
Double rooms are available here.
