DirectConnection

A direct connection prevents any opposing cut.

The term has been introduced in Joseki Volume 1 Fundamentals to distinguish it from indirect connection. An alternative phrase for direct connection is tactical connection. Which phrase is used depends on the intented distinction: For a contrast with indirect connection, one says direct connection; for a contrast with strategic connection, one says tactical connection.

direct connection  

The two black stones are directly connected because the opponent cannot cut apart them. If White tried, some of his cutting stones would be captured and Black would prove that he can maintain the connection.