Literally, not limited to due bounds. Hence, in a general sense, immoderate; exorbitant, unreasonable; arrogant.

Appropriately, wanting in the reserve or restraint which decency requires; wanting in decency and delicacy. It is immodest in decency and delicacy. It is immodest to treat superiors with the familiarity that is customary among equals.

Wanting in chastity; unchaste; lewd; as an immodest female.

Impure; indelicate; as an immodest thought.

Obscene; as an immodest word.