double

double is one of the 1000 most common headwords.

door - double - doubt

**English numbers ^(edit)**
← 1	2	3 → ^{[a], [b]}
Cardinal: two Ordinal: second Frequency: twice Multiplier: double, twofold Distributive: doubly Fractional: half Number of musicians: duo, duet, duplet

Adjective

Positive
double

(usually before a noun) A double door, window, etc. includes two of the same kind.
We opened the double door to let the piano come in.

Call me at five nine double three.
(usually before a noun) A double accident, murder, etc. is two events that happen together or are somehow connected.
With the double wedding, Sunday was the busiest day of the year.
(usually before a noun) A double thing is for two people.
They slept together in a double bed, while James slept in a single in the other room.
Twice as big, twice as many, or twice as much as usual.
I'll have a double coffee.
If something is double, it is 100% bigger than something else.
The new computer was double the cost of the old one.

Usually we see about seventy people a day, but yesterday it was double.

Plain form
double

Third-person singular
doubles

Past tense
doubled

Past participle
doubled

Present participle
doubling

(transitive & intransitive) If something doubles, it grows by 100%.
The price of gold has almost doubled in the last month from $407 to $792.

We need to double the number of people buying it.
(intransitive) If something doubles as something else, it has both roles.
The kitchen doubles as our dining room.
(intransitive) If something doubles up/over, it folds in half.
(intransitive) If two people double up, they stay or work together.

Somebody's double is another person who looks very similar to them.
In baseball, a double is a hit that allows the runner to move to second base.