Which programming language is known for its extensive use of lambdas?

LISP is particularly known for its extensive use of lambdas due to its foundational design and principles in functional programming. In LISP, functions are first-class citizens, meaning that they can be defined, manipulated, and passed as arguments just like any other data type. The use of lambda expressions, which allow for the creation of anonymous functions, is a core feature of LISP's syntax and semantics. LISP's history as one of the earliest programming languages designed explicitly for manipulation of symbolic expressions and its strong support for functional programming paradigms emphasize the use and importance of lambdas in its structure.

While other languages like Python, Java, and Scala also support lambda expressions and functional programming features, LISP stands out historically and conceptually for its deep integration of these concepts right from its inception, making it the language most synonymous with lambdas.