Definitions for "paid search"
a link that comes up on the search list
Paid search (also known as sponsored search) is based upon advertiser bids on queried keywords. Paid search results appear separate from algorithmic, or natural, search results, typically along the top, down the side and across the bottom of search results pages. Listing order is determined by the amount each advertiser has bid on keywords.
the area of keyword, contextual advertising, often called Pay-Per-Click