Your question is unclear (what was your original term, since you have asked for "other terms") and I'm also not sure what you mean by "write a note" but I'll give it a shot as I can provide you with some of the key Neo-Classical terms as they apply to the theater.
It might be helpful to give a brief reminder of what Neo-classicm means in literary history. Neoclassicism was a movement in Europe during the 17th and 18th centuries that sought to return literature to classical reasoning, which was noted for its form and restraint.
Unity of Action: Aristotle called for a "unity of action." Neoclassicists believed that events unfolding on stage had to be logically linked for unity of action to be realized.
Unity of Time: The action in a play, should it take place in a day, does not have to be strictly limited to 24 hours. It is better to let events unfold naturally than have them strictly adhered to. The audience will not be aware of it, usually, unless it is pointed out to them. It is best to not refer to
time at all.
Unity of Place: Events are most believable when they take place in one location but if it is necessary, changes to the stage should only be made during intermissions and in between acts. The best location is one that is "indetermined" and could be both "public and private."