asper UK /ˈæspə/US /ˈæspəɹ/adjective 1noun 2forms 3 adjective1 •(no longer used) Rough or harsh; severe, stern, serious.An asper sound. — 1627 noun2 •(historical) Any one of several small coins, circulated around the eastern Mediterranean area from the 12th to 17th centuries.And for ten Aspers you shall daily finde some amongst them, that will give themselves a deepe gash with a Scimitarie, either in their armes or thighes. — 1603 •(no longer used) Rough breathing; a mark (#) indicating that part of a word is aspirated, or pronounced with h before it. formsaspers · more asper · most asper