American Dictionary

Define dictionary terms easily in our powerful online English dictionary.

Searching for...

No matching words found

Try a different search term or browse the dictionary

Definition milestone in American English

milestone noun

[countable] noun
/ˈmaɪlˌstoʊn/
1

a stone at the side of a road that shows the distance to a particular place

Synonyms and related words
2

an event or achievement that marks an important stage in a process

Example

This film was a milestone in the history of cinema.

Synonyms and related words
Definition milestone in American English