Expeditious, a.
Possessed of, or characterized by, expedition, or efficiency and rapidity in action; performed with, or acting with, expedition; quick; having celerity; speedily; as, an expeditious march or messenger. -- Ex`pe*di"tious*ly, adv. -- Ex`pe*di"tious*ness, n.
Syn. -- Prompt; ready; speedy; alert. See Prompt.
Shades of meaning
Fernald has no entry of its own for expeditious; he lists it under active.
He lists it without comment; the entries above explain its neighbors.