He was the double first student at a university in the UK.

I fell in love with her at first sight.

Safety-first is our top priority in this company.

Safety first is our top priority.

I went skiing for the first time.

He is a first offender.

The first sergeant is responsible for maintaining discipline and order within the unit.

The first stringer played exceptionally well in the match.

The first thing I do in the morning is make a cup of coffee.

She is the first violinist in the chamber orchestra.