Part of the Access database system that retrieves and stores data in user and system databases. The engine can be thought of as a data manager on which database systems are built.
— Computer ScienceAngiotensin converting enzyme. ACE converts an angiotensin to its activated form, angiotensin II, enabling it to function. Angiotensin II constricts blood vessels and elevates blood pressure.
— Medical ScienceTo pass a test, exam, etc. really easily. "Robert aced his physics exam."
— American Slang