There are 4 definitions of -or in English:

-or1

Pronunciation: /ə, ɔː/

suffix

(Forming nouns) denoting a person or thing performing the action of a verb, or denoting another agent: escalator governor resistor

Origin

from Latin, sometimes via Anglo-Norman French -eour or Old French -eor (see also -ator).

Definition of -or in:

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Word of the day humoresque
Pronunciation: ˌhjuːməˈrɛsk
noun
a short, lively piece of music

There are 4 definitions of -or in English:

-or2

suffix

Forming adjectives expressing a comparative sense: junior major

Origin

via Anglo-Norman French from Latin.

Definition of -or in:

There are 4 definitions of -or in English:

-or3

suffix

Forming nouns denoting a state or condition: error pallor terror

Origin

from Latin, sometimes via Old French -or, -ur.

Definition of -or in:

There are 4 definitions of -or in English:

-or4

suffix

US form of -our2.

Definition of -or in: