simple past tense and past participle of pay
"She paid for her dinner and left a generous tip before heading home."
In plain English: To pay means to give money to someone for something you bought or received.
"I paid for my lunch with cash."
Usage: Use "paid" to indicate that money has already been given or that an obligation has been fulfilled at a specific time in the past. It functions as both the simple past tense for completed actions and the past participle when paired with auxiliary verbs like "has" or "had.
marked by the reception of pay
"paid work"
"a paid official"
"a paid announcement"
"a paid check"
involving gainful employment in something often done as a hobby
"After years of painting purely for fun, Sarah finally decided to take her art seriously and start selling her work at local markets."
That is not free of charge; that costs money.
"If you want to upgrade your membership, please note that paid access requires a monthly subscription fee."
In plain English: Paid means you have successfully given money to get something or complete a task.
"The job requires an experienced, paid staff member to handle the finances."
Usage: Use "paid" to describe an expense or service that requires money, such as in a paid subscription or paid parking. Avoid using it when referring to something given without cost, which should instead be described as free or complimentary.
The word "paid" is simply the past tense form of "pay," created by adding the suffix "-ed." Since its meaning has not changed over time, it traveled into English as a standard grammatical marker for completed actions.