/promp"teuhr/ , n.
1. a person or thing that prompts.
2. Theat. a person who is offstage and follows a play in progress from the book, repeating missed cues and supplying actors with forgotten lines.
3. an electronic or mechanical device for prompting a speaker or performer. Cf. TelePrompTer .
[ 1400-50; late ME; see PROMPT, -ER 1 ]