1. Edge or border that resembles a border of a frame you may find on a picture. Frames are often used in word processing, and graphic arts to help focus the viewer's attention.
2. In data or network communications, a frame is a block of data that begins with a header that indicates the beginning of a block of data and a trailer to indicate the ending of the data.
3. When referring to the Internet, a frame is a movable or non-movable portion of a web page that is either loaded from the same server or a different server to help make navigation easier and to bring other content into the page. For example, this technique is often used with Internet advertising banners.