WordNet sense 1 (a cue given to a performer (usually the beginning of the next line to be spoken)):

prompting

WordNet sense 2 ((computer science) a symbol that appears on the computer screen to indicate that the computer is ready to receive a command):

command prompt

WordNet sense 3 (completely prepared or in condition for immediate action or use or progress):

ready

WordNet sense 4 (according to schedule or without delay):

on time

WordNet sense 5 (acting or arriving or performed exactly at the time appointed):

punctual

WordNet sense 6 (give an incentive for action):

actuate, incite, motivate, move, propel

WordNet sense 7 (performed with little or no delay):

immediate, quick, straightaway

WordNet sense 8 (acting or moving or capable of acting or moving quickly):

fast

WordNet sense 9 (characterized by speed and efficiency):

expeditious, timesaving

WordNet sense 10 (being effective without wasting time or effort or expense):

efficient

WordNet sense 11 (assist (somebody acting or reciting) by suggesting the next words of something forgotten or imperfectly learned):

cue, remind

WordNet sense 12 (serve as the inciting cause of):

inspire, instigate