-or

-or¹

suffix (forming nouns) denoting a person or thing performing the action of a verb, or denoting another agent: escalator.

Origin

from L., sometimes via Anglo-Norman Fr. -eour or OFr. -eor (see also -ator).

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-or²

suffix forming nouns denoting a state or condition: terror.

Origin

from L., sometimes via OFr. -or, -ur.

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-or³

suffix forming adjectives expressing a comparative sense: junior.

Origin

via Anglo-Norman Fr. from L.

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-or⁴

suffix US form of -our¹.