Sub | Mean of sub in English Dictionary

/ˈsʌb/

• Noun
• someone who does the job of another person when that person is not able to do it
1. The team's subs need to be versatile.
2. (US) We had a sub [=substitute teacher] in English class all week.
• Verb
• to take the place of another person
1. Smith subbed for Jones at halftime.
2. subbing in a Broadway play
3. Mr. Johnson will be subbing [=working as a substitute teacher] at the high school.
4. Smith subbed Jones at halftime.
5. Jones was subbed (by Smith) at halftime.