one
The number that comes before two and after zero.
The number represented by the numeral 1; the first positive integer.
Used instead of repeating a noun to mean a single person or thing.
Used to refer to a single person or thing already mentioned or easily identified.
A single person or thing.
A single person or thing, considered as a unit.
Together as a single group or thing.
Forming a single unit; united or whole.
'One' means 'any person' in general statements, used in formal English.
Used to refer to an unspecified person in general statements, especially in formal speech or writing.
- Base: one
- Base: one
- Plural: ones
all in one
1Combined into a single thing
When different things are together in the same product or place.
- It's an all-in-one printer, scanner, and copier.
- She’s an athlete, artist, and scholar all in one.
at one with
1In complete harmony with something/someone
Feeling completely connected and peaceful with something or someone.
- He felt at one with nature.
- She was at one with her surroundings.
for one thing
1Giving a reason among others
Used to introduce one reason when there are more reasons too.
- I can’t go, for one thing I have no money.
- For one thing, it’s too far away.
one by one
1Separately, in sequence
Doing things to each person or thing separately, in order.
- The teacher called the students one by one.
- They entered the room one by one.
one of a kind
1Unique and special
Very special and different from all others.
- Her dress was truly one of a kind.
- Her handmade wedding dress was one of a kind.
- This opportunity is one of a kind.
- He’s one of a kind—no one else has his sense of humor.
one of a kind
2completely unique person or thing
Someone or something that is special and different from all others.
- Her artwork is truly one of a kind.
- He’s one of a kind—there’s no one else like him.