1. (noun)successor, replacement a person who follows next in order Synonyms: switch, alternate, substitute, renewal, replacement, successor, transposition, surrogate, refilling, replenishment, substitution, replacing, permutation, heir
2. (noun)successor a thing or person that immediately replaces something or someone Synonyms: heir, replacement
3. (noun)successor, heir a person who inherits some title or office Synonyms: heir, heritor, inheritor, replacement, successor