touch base

base over apex

Falling over in a jumbled heap.

common touch

The personal quality of showing understanding of and sympathy for the concerns of ordinary people; rapport with and acceptance by ordinary people, usually in a celebrity or leader.

get to first base

To get as far as the first phase or milestone of a goal.

golden touch

Synonym of Midas touch (“the ability to achieve financial reward (or, more generally, success) easily and consistently”).

human touch

The ability of a person to deal with others in a personable and empathetic way.

installed base

The number of units of a system or product that are currently in use.

kick into touch

To evade an issue; to stop from happening.

lose one's touch

To lose one's special mastery of or knack for a particular skill or activity.