coming before all others; number one
She was the first person to arrive at the party.
most important or best
Your first priority should be your health.
before anyone or anything else
Please finish your homework first before playing.
for the first time
I first visited Paris when I was twenty.
used to introduce the first point in a list
First, let me introduce myself to the group.
used to show strong determination not to do something
I would quit my job first before working for that company.
the person or thing that comes before all others
He was the first in his family to graduate from college.
the earliest time something is known
The first I heard about the meeting was this morning.
the most likely person or thing
Teachers are often the first to notice learning problems.
something done or experienced for the first time
Flying was a first for both of us and very exciting.
the lowest gear for slow movement
Put the car in first when starting on a hill.
the highest level of university degree in the UK
She worked hard to get a first in her degree.