definition 1: pertaining to or characteristic of life.
example: The nurse checked the patient’s heartbeat and other vital signs.
definition 2: necessary to maintain life.
example: The heart and lungs are vital organs.
example: These foods contain vital nutrients.
definition 3: full of life, vigor, or energy.
example: My grandmother is still vital at ninety years of age.
definition 4: of critical importance; essential.
example: It is vital that you get her to the emergency room immediately.
example: This is a vital step in the process and must not be overlooked.
Collocations: Words that frequently appear in combination with the adjective vital (definition 4)
vital + NOUN: ~ role, ~ part, ~ component, ~ ingredient, ~ information, ~ importance (e.g., a friendship of vital importance to German foreign policy), ~ interest(s) (e.g., a country’s need to protect its vital interests), ~ resource (e.g., Salt was a vital resource for the Saharan people, who traded it with their neighbors), ~ function, ~ link
vital + PREPOSITION: ~ to (e.g., vital to success), ~ for (e.g., vital for the survival of the species)
ADVERB + vital: absolutely ~ (e.g., Russia’s participation in the talks is absolutely vital.), strategically ~ , economically ~