Nouns with other meanings
There are a number of other nouns which have this pattern.
on fire on hold on occasion on order on paper on prescription on sufferance on tiptoe on trial on my behalf /on behalf of ... on my conscience on my part /on the part of ... on my side /on the side of ... on my trail /on the trail of ... on the bandwagon on the boil on the breadline on the cards on the downside on the fly on the gravy train on the hoof on the horizon on the loose on the quiet on the run (from ...) on the throne on the town on the way /on my way somewhere on a collision course (with ...)
Although she is far from being on the breadline, the duchess has faced enormous outgoings.
Sir James believes that business and the environment are on a collision course.
Nigel revealed that he had been on a diet and lost four stone in twelve months.
The war on drugs must be waged on two fronts - supply and demand.
There is a faint ray of hope on the horizon, however.
One plane is already on order and will be delivered in March next year.
It's clear that there's a willingness on the part of everyone concerned to make sure nothing gets in the way of the peace talks.
In Greece, sixty five prisoners are still on the run after a mass breakout from a top security prison last night.
On the way I banged into a side-table which instantly crashed to the floor, but although I winced I did not stop.
The following are used as normal count nouns, but always with words which make the meaning more specific:
front level ticket
Diet is used as a normal count noun.