Main entry: improper
Definition: not suitable or right or appropriate
Usage: slightly improper to dine alone with a married man; improper medication; improper attire for the golf course
Antonyms: proper
Definition: marked by suitability or rightness or appropriateness
Antonyms: right, rightfulness
Definition: anything in accord with principles of justice
Antonyms: compensate, redress, right, correct
Definition: make reparations or amends for
Definition: free from error; especially conforming to fact or truth
Definition: correct in opinion or judgment
Antonyms: right
Definition: in conformance with justice or law or morality
Antonyms: decent
Definition: conforming to conventions of sexual behavior
Antonyms: decorous
Definition: characterized by propriety and dignity and good taste in manners and conduct
Main entry: unconventional, unlawful, improper
Definition: not conforming to legality, moral law, or social convention
Usage: an unconventional marriage; improper banking practices
Antonyms: regular
Definition: in accordance with fixed order or procedure or principle
Antonyms: regular
Definition: (of solids) having clear dimensions that can be measured; volume can be determined with a suitable geometric formula
Antonyms: regular
Definition: (used of the military) belonging to or engaged in by legitimate army forces
Main entry: improper, wrong
Definition: not appropriate for a purpose or occasion
Usage: said all the wrong things
Antonyms: appropriate
Definition: suitable for a particular person or place or condition etc