adjective. rap· id ˈra-pəd. Synonyms of rapid. : marked by a fast rate of motion, activity, succession, or occurrence. rapidly adverb. rapidness noun. 2 of 2. noun. : a part of a river where the current is fast and the surface is usually broken by obstructionsusually used in plural but singular or plural in construction. Synonyms. Adjective. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.