aardvark UK /ˈɑːd.vɑːk/US /ˈɑɹd.vɑɹk/ noun1 •The nocturnal, insectivorous, burrowing mammal Orycteropus afer, of the order Tubulidentata and somewhat resembling a pig. Common in some parts of sub-Saharan Africa.The aardvark burrows in the ground and feeds mostly on termites, which it catches with its long, slimy tongue. formsaardvarks