Meaning of -OR in English

-OR

1.

suffix forming nouns denoting a person or thing performing the action of a verb, or an agent more generally (actor; escalator; tailor) (see also -ATOR, -ITOR).

Etymology: L -or, -ator, etc., sometimes via AF -eour, OF -{euml}or, -{euml}ur 2.

suffix forming nouns denoting state or condition (error; horror).

Etymology: L -or -oris, sometimes via (or after) OF -or, -ur 3.

suffix forming adjectives with comparative sense (major; senior).

Etymology: AF -our f. L -or 4.

suffix US -OUR(1).

Oxford English vocab.      Оксфордский английский словарь.