Definitions:
ontario (in official postal use).

old norse.

physically in contact with and supported by (a surface)

forming a distinctive or marked part of the surface of

having (the thing mentioned) as a topic; about

as a member of (a committee, jury, or other body)

having (the thing mentioned) as a target, aim, or focus

(often followed by a noun without a determiner) having (the thing mentioned) as a medium for transmitting or storing information

in the course of (a journey)

indicating the day or part of a day during which an event takes place

engaged in

regularly taking (a drug or medicine)

paid for by

added to

physically in contact with and supported by a surface

indicating continuation of a movement or action

(of an event) taking place or being presented

(of an electrical appliance or power supply) functioning

(of a performer) on stage.

the leg side.