The word "first" refers to the beginning or initial part of something.
When we use the word "first", we usually mean that it's the earliest time or situation. For example, "I'm going to the movies first on Friday night." In this case, "first" means before anything else happens. But if you say "This is my first week at school," "first" means the beginning of a new experience - your first chance to try something. People also use "first" to compare things, like "The biggest apple was first on the left."
The person or thing in the first position.
Example: He was the first to complete the course.
Preceding all others of a series or kind; the ordinal of one; earliest.
Example: I was the first runner to reach the finish line, and won the race.
Before anything else; firstly.
Example: Clean the sink first, before you even think of starting to cook.
