From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( a.) Remaining much at home; devoted to home duties or pleasures; as, a domestic man or woman.

(2): ( a.) Of or pertaining to a nation considered as a family or home, or to one's own country; intestine; not foreign; as, foreign wars and domestic dissensions.

(3): ( a.) Of or pertaining to one's house or home, or one's household or family; relating to home life; as, domestic concerns, life, duties, cares, happiness, worship, servants.

(4): ( a.) Made in one's own house, nation, or country; as, domestic manufactures, wines, etc.

(5): ( n.) One who lives in the family of an other, as hired household assistant; a house servant.

(6): ( n.) Articles of home manufacture, especially cotton goods.

(7): ( a.) Living in or near the habitations of man; domesticated; tame as distinguished from wild; as, domestic animals.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]

("belonging to the house or household") has several ecclesiastical senses:

(1) Domestici are all who belong to the "household of faith."

(2) In the East, the principal dignitary in a church choir after the "chief singer." There was one on each side of the choir, to lead the singers in antiphonal chanting.

(3) Domesticus Ostiorum ("of the doors"), the chief doorkeeper at Constantinople. See Smith, Dict. of Christ. Antiq. s.v.