Learn the meaning and usage of the adverb definitely , which means without any doubt. See how to use it in sentences and contrast it with indefinitely and certainly. Discover everything about the word " DEFINITELY " in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide. The word " definitely " is one that is often misspelled, but it is essential to learn how to spell it correctly to avoid errors in written communication. The correct spelling of " definitely " is often confused with similar-sounding words such as "defiantly," " definitely ," or "definately." The word " definitely " is an adverb that means without doubt or certainly. It is derived from the Latin word "definitus," which means "defined" or "determined." The correct spelling of this word has been ... Learn how to spell and use the word definitely , which means "without doubt" or "clearly". Avoid the common misspelling definately and see examples of definitely in sentences.