What does 单位 (dān wèi) mean in English?

Card 191HSK 2010 Level 5191/1311
CARD191
PROGRESS15%
单位
单單
dān wèi
a unit; unit (of measure); work unit (one's workplace); CL:個|个[ge4]

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d