strike up

[strike up] {v.} 1a. To start to sing or play.

We were sittingaround the camp fire. Someone struck up a song, and we all joined in.

The President took his place on the platform, and the band struckup the national anthem.

1b. To give a signal to start (a band)playing.

When the team ran on the field, the band director struckup the band.

2. To bring about; begin; start.

The policeman struckup a conversation with John while they were waiting for the bus.

It did not take Mary long to strike up acquaintances in her newschool.