What does "punch in" mean?

To enter a workplace by punching a timecard.

What is a synonym for "punch in"?

Common synonyms include: accomplish, achieve, approach, arrive, arrive at, arrive in.

verb, slang

verb, slang ·Moderate ·High school level

Verb

1
To enter a workplace by punching a timecard. US, intransitive
"I'm going to punch in a bit early today to get more work done."
2
register one's arrival at work wordnet
3
To input values to a computer or a calculator. colloquial, transitive
"Just punch in the numbers and it will give you an estimate of the cost."
4
To score. slang

"I'm going to punch in a bit early today to get more work done."