Buy, Sell, Auction, Value & Consign rare and collectible U.S. coins. Heritage specializes in gold coins, silver coins, slabbed and graded coins of all varieties. ha (hɑː) or hah interj 1. an exclamation expressing derision, triumph, surprise, etc, according to the intonation of the speaker 2. (reiterated) a representation of the sound of laughter uk us written abbreviation for hectare: a unit for measuring the area of something, equal to 10,000 square metres (Definition of ha from the Cambridge Business English Dictionary © Cambridge University Press) Browse and Find coins, comics, currency, art, luxury handbags, sports memorabilia, wine, historical items, books, real estate, and more at Heritage Auctions. The hectare (/ ˈhɛktɛər, - tɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100- metre sides (1 hm 2), that is, 10,000 square metres (10,000 m 2), and is primarily used in the measurement of land. Attested early 14th century, [1] of onomatopoeic origin. Compare Danish ha, Dutch ha, Finnish ha, Hungarian ha, Latin ha, Latvian ha, Swedish ha. The meaning of HA is —used especially to express surprise, joy, or triumph. How to use ha in a sentence. This disambiguation page lists articles associated with the title Ha. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Browse and Find coins, comics, currency, art, luxury handbags, sports memorabilia, wine, historical items, books, real estate, and more at Heritage Auctions.