1. Get in touch (with someone): To initiate or establish contact or communication with someone.
Ex. They told me you were out sick when I tried to get in touch with you at your office yesterday.
2. Lose one’s touch: No longer be able to handle something skillfully.
Ex. Have you lost your touch with tools?
3. Keep in touch: to continue to talk to or write to someone.
Ex. I’ve always kept in touch with Emily.
4. Out of touch: Not in contact or communicating any longer; not aware of the news or status of someone or something.
Ex. John has been out of touch with everything since 1999.
5. Soft touch: a person who gives or asks something.
Ex. Your mother is a soft touch, you can always persuade her to anything.
6. Touch base: briefly make or renew contact with someone.
Ex. Peter plans to touch base with his relatives this weekend.
7. Finishing touch: a final detail or action completing and enhancing a piece of work.
Ex. Only the finishing touch and the cake is ready.