What is the meaning of -dom?

Forming nouns denoting the condition or state of the suffixed word.

Forming nouns denoting the domain or jurisdiction of the suffixed word.

Forming nouns — usually nonce words — denoting the set of all examples of the suffixed word.

Forming nouns denoting the fandom of the suffixed word.

Indicates a condition, situation or period.

Indicates a religion, teaching or similar.

belonging to a domain or territory (e.g. groothertogdom (grandduchy); this sense is no longer productive)

quality or condition of the adjective stem (e.g. eigendom less productive than suffixes like -heid)

belonging to a domain or territory (e.g. Hartogdom (duchy); this sense is no longer productive)

quality or condition of the adjective stem (e.g. Riekdom less productive than suffixes like -heit)

Forming nouns denoting a state, condition, or office; -dom.

Forming nouns denoting a condition or quality; -dom.

Jordan, Richard (1974)  Eugene Crook, transl., Handbook of the Middle English Grammar: Phonology (Janua Linguarum; 214), The Hague: Mouton & Co. N.V., →DOI, § 137, page 140.

-dọ̄m, suf.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.

Suffix used to form nouns out of adjectives, meaning the quality, property or condition of the adjective.

Suffix used to form nouns out of adjectives, meaning the quality, property or condition of the adjective.

used to derive abstract nouns: -dom

(belonging to a) domain or jurisdiction

condition or quality

-hood, -ledge, -ness; making a noun (representing a state) from an adjective or noun

Source: wiktionary.org