1regulations; rules; provisions; stipulations
2to stipulate; to specify; to prescribe; to fix (a price); to set (a quota)
Example
suǒ yǒu所有wén zhāng文章dōu都bì xū必须zài在guī dìng规定shí jiān时间nèi内jiāo交shàng lái上来。
所有文章都必须在规定时间内交上来。
All essays must be handed in on time.