A man who wants to marry a particular woman. (Cambridge Dictionary)
A person or company who wants to take control of another company. (Cambridge Dictionary)
One that petitions or entreats. (Merriam – Webster)
A man who pursues a relationship with a particular woman, with a view to marriage. (Oxford Dictionaries)
A woman’s suitor is a man who wants to marry her. (Collins Dictionary)
The Suitor painting.