The person or thing in the first position.
He was the first to complete the course.
The first gear of an engine.
Something that has never happened before; a new occurrence.
This is a first. For once he has nothing to say.
First base
There was a close play at first.
A first-class honours degree.
A first-edition copy of some publication.
A fraction of an integer ending in one.
one forty-first of the estate
Time; time granted; respite.