1.
sign, signboard, billboard
A board displaying information, often a shop name or advertisement.
2.
figurehead, poster child
A person or thing that represents or symbolizes something.
看板 has multiple meanings related to representation and display.
Common expressions:
- 看板を出す (to put up a sign; to open for business)
- 看板を下ろす (to close down a business)
- 看板商品 (flagship product)
- 看板娘/看板女優 (poster girl/leading actress)
- 看板に偽りなし (truth in advertising)
Business/manufacturing:
- かんばん方式 (Kanban system - Toyota's just-in-time manufacturing method)
Note on closing time:
- 看板だ (It's closing time - from the practice of taking down signs at closing)