Noun | 1. | hl - a metric unit of volume or capacity equal to 100 liters metric capacity unit - a capacity unit defined in metric terms dal, decaliter, decalitre, dekaliter, dekalitre, dkl - a metric unit of volume or capacity equal to 10 liters cubic meter, cubic metre, kiloliter, kilolitre - a metric unit of volume or capacity equal to 1000 liters |