## As pronouns the difference between **someone** and **one**

is that

**someone** is some person while

**one** is (

*lb*) one thing (among a group of others); one member of a group.

## As nouns the difference between **someone** and **one**

is that

**someone** is a partially specified but unnamed person while

**one** is (mathematics) the neutral element with respect to multiplication in a.

## As a numeral **one** is

(cardinal) a numerical value equal to ; the first number in the set of natural numbers (especially in number theory); the cardinality of the smallest nonempty set ordinal: first.

## As an adjective **one** is

of a period of time, being particular; as, one morning, one year.

## As a verb **one** is

(obsolete|transitive) to cause to become one; to gather into a single whole; to unite.