Not doing anything during a specific time, or not active even though they have the ability to be active.
1) The seeds will remain dormant till spring.
2) Her emotions have lain dormant for many years.
Middle English, fixed, stationary, from Anglo-French, from present participle of dormir which means 'to sleep'.
asleep, dozing, napping, resting, slumbering
awake, sleeplessness, wakeful, wide-awake