Main entry: reduce, boil down, concentrate
Definition: cook until very little liquid is left
Usage: The cook reduced the sauce by boiling it for a long time
Main entry: concentrate, decoct, boil down, reduce
Definition: be cooked until very little liquid is left
Usage: The sauce should reduce to one cup
Main entry: reduce, boil down, come down
Definition: be the essential element
Usage: The proposal boils down to a compromise