In`de*co"rous (?; 277), a. [L. indecorous. See In- not, and Decorous.] Not decorous; violating good manners; contrary to good breeding or etiquette; unbecoming; improper; out of place; as, indecorous conduct.

It was useless and indecorous to attempt anything more by mere struggle.

Syn. -- Unbecoming; unseemly; unbefitting; rude; coarse; impolite; uncivil; ill-bred.