A2 [U] (knowledge from) the careful study of the structure and behaviour of the physical world, especially by watching, measuring, and doing experiments, and the development of theories to describe the results of these activities: pure/applied science recent developments in science and technology Space travel is one of the marvels/wonders of modern science.Subjects and disciplines B1 [C or U] a particular subject that is studied using scientific methods: physical sciences Economics is not an exact science. advances in medical scienceSubjects and disciplines A2 [U] the study of science: a science graduate/teacher a science course/lessonSubjects and disciplines