adverb
used to say that something is certain or clearly true
She is undoubtedly the best person for the job.
The decision will undoubtedly affect many families.
Good to know
Undoubtedly is especially common in writing and formal speech. In everyday conversation, definitely is often more natural.
Common phrases & grammar
undoubtedly the best · undoubtedly important · undoubtedly one of the most popular
undoubtedly + verb
undoubtedly + adjective