What does "in touch" mean?

In contact, or in communication.

In touch

prep_phrase

prep_phrase ·Rare ·Advanced level

Prep_phrase

1
In contact, or in communication. idiomatic
"Let's stay in touch."
2
outside the playing area or touching the touchlines of the playing area.
"Kick the ball in touch."

"I'm not reachable over the weekend, but I'll be in touch early in the week."