mid-15c., "having or possessed of manners or demeanor;" in compounds, "having manners of a certain kind;" from manner. Later, especially, "well-mannered." Also, especially in arts and literature, "characterized by mannerism, artificial, affected" (by 1801). The form ymanered is attested from late 14c. Compare mannerable "well-mannered" (late 15c.).
updated on November 16, 2018