Definition - What does Apache Thrift mean?
The designers of Apache Thrift refer to it as a "scalable cross-language service development" tool. Others might call it a "serialization platform" or a "cross-language support resource." Apache Thrift consists of a software stack and a code-generation engine that help to provide different kinds of support for cross-language engineering.
Techopedia explains Apache Thrift
In general, Apache Thrift helps companies deal with situations where polyglot systems have made overall administration difficult. Even companies that have committed to using one software language for development usually have bits of other programming languages included in various aspects of their IT architecture. Apache Thrift can help bridge the gap when engineers have to go in and make these different modules talk to one another.