You know what it looks like… but what is it called?
TAKE THE QUIZ“at (the) first”
The following 2 entries include the term at (the) first.
at the first opportunity
idiom: as soon as it is possible for someone to do something
at the first sign
idiom: as soon as something happens that indicates an action or event has begun to take place
Love words? Need even more definitions?
Merriam-Webster unabridged