总体 (zǒng tǐ) is a noun meaning 'overall, total' — it refers to the whole or entirety of something, often used in analysis or statistics. Unlike 全部 (quán bù 'all, whole') which is more concrete and general, 总体 implies a holistic or aggregate view, as in 总体情况 'overall situation'. In statistics, it also means 'population' (the entire group under study), distinct from 人口 (rén kǒu 'population of people').