A very basic definition of "search term" is given here - http://encyclopedia2.thefreedictionary.com/search+term. Check this bit especially - This will help to answer any basic questions you may have about Google - http://www.googleguide.com/index.html. Cheers.
This is any keyword you use when you type it in the search string in the search engine. But the definition today might expend its meaning to a further notion: it is any keyword you type in, pronounce or draw in the search string.
There are 3 parts to a search engine: 1. The search engines use robots (also known as spiders) to search the internet for websites. 2. The results of the spiders’ travels are put in an database which is then indexed based on words found and where these words were found. 3.The users of search engines search for words or phrases related to what they are looking for and the search engine index returns related sites.