Collins Chinese Dictionary Plus (3rd edition), 2011:
囿
yòu (书)I 名
enclosure
- 鹿囿 lùyòu deer park
II 动
limit
- 囿于(於)成见(見) yòu yú chéngjiàn be blinded by prejudice
- 囿于(於)孤陋寡闻(聞) yòu yú gū lòu guǎ wén be handicapped by ignorance