Emily Dickinson Lexicon

IM-MOD'EST, a. [Fr. immodeste; L. immodestus; in and modestus, modest. See the latter.]

1. Literally, not limited to due bounds. Hence, in a general sense, immoderate; exorbitant; unreasonable; arrogant.
2. Appropriately, wanting in the reserve or restraint which decency requires; wanting in decency and delicacy. It is immodest to treat superiors with the familiarity that is customary among equals.
3. Wanting in chastity; unchaste; lewd; as, an immodest female.
4. Impure; indelicate; as, an immodest thought. Dryden.
5. Obscene; as, an immodest word.