simple past tense and past participle of confirm
"The manager confirmed that the meeting had been rescheduled to next Monday."
In plain English: To confirm something means to officially say that it is true or has really happened.
"The doctor confirmed that my test results were normal."
Usage: Use confirmed as the standard past tense or past participle to indicate that an event has officially happened or a belief has been proven true. Avoid using it as a present tense verb, which should be confirms.
having been established or made firm or received the rite of confirmation
"confirmed reservations"
"received confirmed reports of casualties"
"a confirmed Catholic"
having a settled habit; inveterate or habitual
"His confirmed bad habits made it impossible for him to ever get enough sleep on weekends."
In plain English: Confirmed means something is officially proven to be true after being checked and verified.
"The confirmed guest will arrive at the hotel today."
Usage: Use "confirmed" to describe someone who has developed a long-standing, unchangeable habit or disposition, such as a confirmed bachelor or a confirmed optimist. Avoid using it simply to mean "verified" when referring to facts or news reports.
Derived from Latin confirmatus, the past participle of confirmare meaning to strengthen or make firm, it originally described something made solid or established with certainty.