¹ double adjective

• made of two parts that are similar or exactly the same
• having two very different parts or qualities
• of a size that is twice as big as usual : of an amount that is twice as much as usual

² double verb

• to cause (something) to become two times as great or as many
• to become two times as great or as many
• to have a second job or use—+ as

³ double noun

• something that is two times the usual size, strength, or amount
• someone who looks very much like another person
• a person who looks like an actor and takes the actor's place in some scenes in a movie or TV show

⁴ double adverb

• two times as many or as much
• two times—usually used in combination