Definitions:

1. before another in time, space, or importance adverb
   • I was here first
2. before anything else adverb
   • first we must consider the garter snake
3. coming before all others; highest in an ordering or series noun
   • The dog was first to be adopted.
4. highest in pitch or chief among parts or voices or instruments or orchestra sections adjective
   • first soprano
5. preceding all others in time or space or degree adjective
   • the first house on the right
6. ranking above all others adjective
   • They were first in their class to the surprise of nobody.
7. the first element in a countable series noun
   • the first of the month
8. the initial time adverb
   • when Felix first saw a garter snake

Synonyms:

• beginning
• first base
• first of all
• first off
• first-class honours degree
• firstly
• for the first time
• foremost
• inaugural
• initiative
• initiatory
• low
• low gear
• maiden
• number 1
• number one
• world-class

NearBy Words:

• first-class
• first-come-first-serve
• first-come-first-serve
• first-nighter
• first-rate
• first-rater
• first-string
• first-year
• firstborn
• firsthand
• firstly