What does necessarily mean?
Necessarily means that something happens as an unavoidable consequence or follows with logical certainty. In ordinary conversation, it is often close to inevitably: one event or decision necessarily leads to another. In academic, philosophical, and legal writing, it can carry the stronger implication that the conclusion must be true if the relevant premises or conditions are accepted. The word is useful because it distinguishes necessity from probability or likelihood. Saying that an outcome is probably possible is very different from saying that it necessarily follows. However, necessarily can sound absolute, so writers sometimes use it with care or qualify it, as in “not necessarily.” Its formation from necessary plus the adverbial ending -ly reflects the long-established English tendency to turn adjectives into adverbs, while its underlying roots connect it to necessity, requirement, and inevitability.
adverbAs a necessary consequence or logical requirement; inevitably or without any possibility of otherwise.
- As a necessary result or inevitable consequence of circumstances, decisions, or actions.
- By logical necessity; with the certainty that something must be true given the stated premises.
"If the account is accurate, the discrepancy necessarily raises questions about how the figures were compiled."
"A greater investment in maintenance does not necessarily produce better results if the underlying process remains flawed."
"If the premises are contradictory, the conclusion does not necessarily follow."
The -ly in necessarily does not mean occasionally; it marks a conclusion as unavoidable.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does necessarily come from?
Necessarily was formed in English from necessary with the adverbial ending -ly, following the ordinary English pattern of deriving adverbs from adjectives. Necessary itself comes through Old French from Latin necessarius, which was derived from necesse, “necessary” or “needful.” The Latin family also includes necessity and necessitate, reflecting the shared sense of something being required or unavoidable.
How necessarily is actually used
Necessarily is formal and emphatic. In everyday use it often means inevitably, while in arguments and academic writing it can indicate a strict logical implication. There is no major British–US difference in meaning.
Easily confused with necessarily
Necessary is an adjective describing what is required or unavoidable, whereas necessarily is an adverb meaning as a necessary consequence or by logical necessity.