Meaning of rock-a-bye In English

• 0 to rock a baby (= to move it backwards and forwards or from side to side in a regular way) to help it to sleep:

  • The Czech word for a lullaby is derived from the verb kolébat, meaning to rock-a-bye.

  • a well-known lullaby called "Rockabye Baby"

• 1 used to describe the action of rocking a baby to sleep, or something that relates to this:

  • He was holding a big plank of wood in his arms rock-a-bye style.