dom

US: 'dom': (dom; for 2 also Port. dôn); 'Dom': (dom)

WordReference Random House Unabridged Dictionary of American English © 2025

dom  (dom; for 2 also Port. dôn), n. 

1. (sometimes cap.) a title of a monk in the Benedictine, Carthusian, Cistercian, and certain other monastic orders.
2. (usually cap.) a Portuguese title affixed to a man's given name;
   Sir: formerly a title of certain dignitaries.

• short for Latin dominus lord, master 1710–20

Dom  (dom), n. 

1. a male given name, form of Dominic. 

-dom, 

1. a suffix forming nouns which refer to domain (kingdom), collection of persons (officialdom), rank or station (earldom), or general condition (freedom).

• Middle English; Old English -dōm; cognate with Old Norse -dōmr, German -tum; see doom

Dom., 

1. Dominica.
2. Dominican.

dom., 

1. domain.
2. domestic.
3. dominant.
4. dominion.

D.O.M., 

1. Foreign Terms to God, the Best, the Greatest.

• Latin Deō Optimō Maximō

d.o.m., [Slang.]

1. dirty old man.

WordReference Random House Learner's Dictionary of American English © 2025

-dom, suffix. 

1. -dom is attached to some nouns and adjectives to form nouns, with the meanings:
   • domain or area ruled: king + -dom → kingdom (= area a king rules).
   • collection of persons: official + -dom → officialdom (= a collection of officials).
   • rank: earl + -dom → earldom (= the rank or position of an earl).
   • general condition: free + -dom → freedom (= general condition of being free).

Collins Concise English Dictionary © HarperCollins Publishers::

-dom suffix:forming_nouns

1. state or condition: freedom, martyrdom
2. rank or office: earldom
3. domain: kingdom, Christendom
4. a collection of persons: officialdom

Etymology: Old English -dōm