Of or resembling a mastodon; (later) spec. of or relating to the former taxon Mastodontoidea, including many or all species of mastodon.

Characteristic of or resembling a mastodon; very large and bulky. Chiefly figurative.

Of or relating to a mastodon; resembling or characteristic of a mastodon. In early use also: †= mastozootic, adj. (obsolete). Also figurative.

Having teeth like a mastodon. Obsolete. rare.