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
Preceding all others of a series or kind; the ordinal of one; earliest.
I was the first runner to reach the finish line, and won the race.
Most eminent or exalted; most excellent; chief; highest.
Demosthenes was the first orator of Greece.
Before anything else; firstly.
Clean the sink first, before you even think of starting to cook.
For the first time;
I first witnessed a death when I was nine years old.
Time; time granted; respite.