buy up

Từ điển WordNet v3.1 - WordNet Dictionary

verb

take over ownership of;
of corporations and companies (Freq. 2)
• Syn:
take over, buy out
• Derivationally related forms:
buyout (for: buy out), takeover (for: take over)
• Hypernyms:
buy, purchase
• Verb Frames:
- Somebody ----s something
- Something ----s something
- The men buy up the chairs