Gateway has several meanings. It may often share meanings with the term gate.

• Gateway is the name of a jazz trio; see Gateway (band)
• Gateway is a common term in telecommunications; see gateway (telecommunications).
• Gateway is a phrase used by webmasters and search engine optimizers to describe a webpage designed to attract visitors and search engines to a particular website. A typical gateway page is small, simple and highly optimized. Its primary goal is to attract visitors searching for relevant key words or phrases, and provide hyperlinks to pages within the website.
• Gateway is also a technical term for the software interface between a web-based shopping cart (or order form) and a merchant account (See also electronic commerce).
• Gateway is also a name of a 1976 novel by Frederik Pohl, the first book of the Heechee series and winner of the Hugo Award and Nebula Award.
• Gateway is a computer manufacturer; see Gateway Computers.
• The Gateway Sports and Entertainment Complex (more commonly known as Gateway) is a stadium complex in Cleveland, Ohio, containing Jacobs Field and Gund Arena.
• In Aliens, Gateway was the name of one of the large space station complexes in Earth orbit.

Gateway is a computer or a network that allows access to another computer or network.