Idioms with FIRST

at first
in or at the beginning
I didn’t like the job at first.

come first
to be the most important person or thing to someone
My career is important, but my family always comes first.

first of all
before anything else
First of all, I’d like to thank you all for coming.

first and foremost
most importantly; more than anything else
Despite her success as a writer, she is first and foremost a teacher.

put someone/something first
to consider someone/something to be more important
Businesses should always put the customer first.