Bidder (noun)

1. A person who makes an offer for something, especially at an auction or in a business setting.
2. A person or entity that participates in a bidding process.

Origin:

The word bidder comes from the verb "to bid" which means to make an offer for something, especially at an auction or in a business setting.

Examples:

1. The highest bidder at the auction won the painting.
2. The bidders were given a chance to inspect the property before the auction.
3. The bidder submitted a proposal to the city council.
4. The bidder is the company that has submitted the highest bid for the project.
5. The bidders were asked to submit sealed bids by a certain date.