Alternative spelling of on the air, especially when used attributively.

A road in which traffic is only allowed to proceed in one direction. / (figuratively) A course of action that cannot be undone or does not lead to reciprocation.

(Incoterm) without charge to the purchaser for delivery on board a carrier (originally a ship), at a specified location or point; used in such phrases as FOB destination to specify the point where the title of goods passes from the seller to the buyer

Speaking or acting for.

(not comparable) Moving forward. / Advanced in a forward direction or toward an end.

In a forward direction.

To keep going; to progress or persevere.

(set phrase) At some unspecified time in the future. / At some unspecified time in the past. / Used other than figuratively or idiomatically: see one, day.

Accurate, or accurately predicted. / With accuracy. / (sports, of a shot) Towards the goal.

(idiomatic) Insane, crazy. / (idiomatic) Temporarily mentally unstable; very distressed.