breakthrough noun

ADJ. big, crucial, great, historic, important, major, real, significant | diplomatic, medical, political, scientific, technological

VERB + BREAKTHROUGH be, represent | achieve, make We have achieved a real breakthrough in the search for peace.

BREAKTHROUGH + VERB come, happen The crucial breakthrough came almost by accident.

PREP. ~ for The new deal represents a major breakthrough for the company. | ~ in a significant breakthrough in computer design