supa 1n A unit of measure, approximately the size of a 12 oz can; also quantity of rice to fill a small box made specifically to measure rice or grain by volume. [If a 12 oz can is used, it takes approximately 6 units to equal 1 kilo, but about 4 supas if the box type supaan is used.] 2v To measure with a supaan such as rice or grain. 3deriv n A can, usally 12 oz, used to measure rice or grain.