Definitions of prompt:

• noun:   (computer science) a symbol that appears on the computer screen to indicate that the computer is ready to receive a command
• noun:   a cue given to a performer (usually the beginning of the next line to be spoken)

  Example: "The audience could hear his prompting"

• verb:   serve as the inciting cause of

  Example: "She prompted me to call my relatives"

• verb:   assist (somebody acting or reciting) by suggesting the next words of something forgotten or imperfectly learned
• verb:   give an incentive for action
• adjective:   quick in apprehending or reacting

  Example: "A prompt (or ready) response"

• adjective:   according to schedule or without delay

  Example: "A prompt reply"

• adjective:   characterized by speed and efficiency
• adjective:   performed with little or no delay

  Example: "Prompt obedience"