Date: 1500-1600
Language: Old French
Origin: acertainer, from certain


as‧cer‧tain [intransitive and transitive]
formal to find out something:
A postmortem was ordered to try to ascertain the cause of death.
ascertain whether/what/how etc
Tests were conducted to ascertain whether pollution levels have dropped.
ascertain that
Police had ascertained that the dead man knew his killer.
ascertain something from somebody/something
You should ascertain the level of insurance cover from the car rental company.
ascertainable adverb

Dictionary results for "ascertain"
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