1. being before all others with respect to time, order, rank, importance, etc., used as the ordinal number of one: the first edition; the first vice president.
2. highest or chief among several voices or instruments of the same class: first alto; first horn.
3. low¹ (def. 31).
4. being a member of the household or an intimate acquaintance of the president of the United States or of the governor of a state: the First Lady; Checkers, the first dog.

5. before all others or anything else in time, order, rank, etc.
6. before some other thing, event, etc.: If you're going, phone first.
7. for the first time: She first visited Atlanta in 1980.
8. in preference to something else; rather; sooner: I'd die first.
9. in the first place; firstly.

10. the person or thing that is first in time, order, rank, etc.
11. the beginning.
12. the first part; first member of a series.
13. Music.
• the voice or instrument that takes the highest or chief part in its class, especially in an orchestra or chorus.
• a leader of a part or group of performers.
14. low gear; first gear: She shifted into first and drove off.
15. the winning position or rank in a race or other competition.
16. first base (def. 1).
17. Usually firsts .Commerce.
• a product or goods of the first or highest quality.
• goods produced according to specifications, without visible flaws.
18. British University.
• first-class honors.
• a person who has won such honors.

19. everything considered; above all else; altogether: First and last, it is important to know oneself.
20. at the outset; in the beginning: He wanted to know first off why he hadn't been notified.
21. before anything else: I'll call you first thing when I arrive.

• coming before all others; earliest, best, or foremost
• (as noun)
2. preceding all others in numbering or counting order; the ordinal number of one . Often written: 1st
3. rated, graded, or ranked above all other levels
4. denoting the lowest forward ratio of a gearbox in a motor vehicle
5. music
• denoting the highest part assigned to one of the voice parts in a chorus or one of the sections of an orchestra
• denoting the principal player in a specific orchestral section
6. as the first action of the day
7. things must be done in order of priority
8. even one thing

9. the beginning; outset
10. an honours degree of the highest class
11. something which has not occurred before
12. the lowest forward ratio of a gearbox in a motor vehicle; low gear
13. music
• the highest part in a particular section of a chorus or orchestra
• the instrument or voice taking such a part
• the chief or leading player in a section of an orchestra; principal
14. music a rare word for prime (def. 11)

15. before anything else in order, time, preference, importance, etc
16. on the whole; overall
17. throughout
18. for the first time
19. in the first place or beginning of a series of actions

More Definitions

• WEBER (noun) Definition, Meaning & Examples
• IUCN RED LIST (noun) Definition, Meaning & Examples
• PERITRICHATE (noun) Definition, Meaning & Examples
• SIREN (noun) Definition, Meaning & Examples
• TRUE LEVEL (noun) Definition, Meaning & Examples
• MISMARRIAGE (noun) Definition, Meaning & Examples