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a1 the first letter of the English alphabet. [3 definitions]
a2 any one of a group or kind. [3 definitions]
a3 in every or in each; for every or for each.
a-1 a prefix that means "on," "at," "into," or "to."
a-2 a prefix that means "away," "from," or "off." [2 definitions]
aardvark a large mammal with a long snout, long ears, a long tail, and almost no hair. Aardvarks are active at night, when they use their powerful claws to dig open ant or termite nests. They catch their food with long, sticky tongues. Aardvarks live in southern and central Africa. Although they are sometimes called anteaters, aardvarks are not closely related to any other kind of mammal.