Definitions

1. adjective

consisting of or having more than one word

“The phrase ‘once upon a time’ is a multiword expression.”

2. noun

a phrase or expression consisting of more than one word

“The multiword phrase ‘break a leg’ is a common idiom.”

3. noun

a word or words used to form a phrase or expression

“The multiwords ‘how are you?’ form a polite greeting.”