Definition of metagram in English:

metagram

Pronunciation /ˈmɛtəɡram/

noun

  • A word game involving letter-substitution; specifically one in which one word is transformed into another by a series of stages, each of which involves substituting one letter to form another word.

Origin

Early 19th century (in an earlier sense). From meta- + -gram, after anagram. Compare earlier metagrammatism and meta-grammatizing.