marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"
being and remaining ready and available for use; "waiting cars and limousines lined the curb"; "found her mother waiting for them"; "an impressive array of food ready and waiting for the guests"; "military forces ready and waiting"