What does vital mean?
Vital is an adjective meaning absolutely necessary for a particular purpose, result, or process. It is stronger and more emphatic than merely important: something described as vital is indispensable, and its absence would seriously disrupt an activity, result, or even continued life. The word appears regularly in professional and formal contexts, including phrases such as “vital importance,” “vital role,” and “vital signs.” In medicine, vital refers to essential bodily functions such as breathing, pulse, temperature, and blood pressure. A secondary sense connects the word with life itself, as in “vital organs,” while another traditional literary use suggests energy, life, or animation. Because it conveys necessity so strongly, vital should generally be reserved for genuinely indispensable things; using it for every important detail can dilute its force. Its Latin ancestry also makes it a useful example of how a word associated directly with life can develop the more general sense of being essential.
Absolutely necessary or essential to a purpose, outcome, or process; also, in specialized contexts, relating to life or the bodily functions required to sustain it.
"Clear communication is vital when the team is working under pressure."
The expression “vital to” is idiomatic for describing something indispensable. “Vitals” should not be confused with “vitamins.”
A bodily organ or bodily function considered essential to life, usually used in the plural form “the vitals.”
"The doctor checked the patient's vitals before examining him."
The noun is overwhelmingly used in the plural. In the singular, “a vital” is uncommon and may sound archaic or context-dependent.
The standard plural form is used for the bodily functions and physiological measurements essential to life, such as pulse, breathing, temperature, and blood pressure.
"Her vitals remained stable throughout the night."
Vital literally comes from the Latin word for life, so even its modern sense of “indispensable” carries the idea that something without which life or activity cannot continue.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of vital
Vital entered English in the early 17th century from the Latin vitalis, meaning “of or pertaining to life.” The Latin adjective was formed from vita, “life,” a word also underlying vitamin, viable, and vivacious. Early English uses included both the general sense “of or relating to life” and the figurative sense “essential,” which later became the word's dominant modern meaning.
Related word forms
How vital is actually used
In modern general use, vital usually emphasizes indispensable importance and often appears in formal or professional contexts. The phrase “vital to” is especially common. Medical expressions such as “vital signs” form an established technical idiom.
Easily confused with vital
Vital means essential or inseparable from a purpose or life, whereas viral means spreading widely, especially through the internet or a biological virus.