sign on

verb

signed on; signing on; signs on

intransitive verb

1

: to engage oneself by or as if by a signature

signed on to the new project

2

: to announce the start of broadcasting for the day

sign-on

ˈsī-ˌnȯn 

-ˌnän

noun

Synonyms

• enlist (in)
• enroll (in)
• enter
• join
• sign up (for)

Word History

First Known Use

1879, in the meaning defined at sense 1

Kids Definition

sign on

verb

(ˈ)sī-ˈnȯn,

-ˈnän

1

: to hire oneself by or as if by a signature

signed on as a member of the crew

2

: to announce the beginning of broadcasting