IPA: /ˈæk.jʊ.mən/
KK: /ˈæk.jə.mən/
The ability to make good judgments and quick decisions, especially in a specific area or field.
Her business acumen helped her to make profitable decisions.
Acumen comes from the Latin word "acumen" (meaning a sharp point or edge). It refers to the ability to make good judgments and quick decisions, particularly in a specific domain.
Think of 'sharpness' ('acumen' in Latin) to remember that acumen means having sharp insight or keen judgment.