The term 'Voice in an iPhone' can be summarized by the crossword solution 'Siri, ' which is a virtual assistant developed by Apple Inc. for its iOS, iPadOS, watchOS, macOS, and tvOS operating systems. Siri uses natural language processing to answer questions, make recommendations, and perform actions by delegating requests to a set of Internet services. Siri was introduced in 2011 and has since become an integral part of the Apple ecosystem.