adjective
The Kennedys were regarded as among 'the first people of Boston'. I heard that your son is now first violinist in the Philharmonic
The first clock in England was made about 1288. The first assault resulted in great loss of life
It is necessary to return to first principles
adverb
Bannister came in first
First, I want to thank you all for coming to my party
noun
I knew you'd win from the first
Britain achieved three firsts in yesterday's athletics meeting
I didn't believe him at first