Word: 定律 (dìnglǜ) 定律 dictionary entry dìnglǜ scientific law (e.g. law of conservation of energy); a generalization based on observation (e.g. "power corrupts") Full dictionary entry for 定律 Example sentences using 定律 2 sentences, showing page 1 of 1. 老师在讲物体下落的定律。 Lǎoshī zài jiǎng wùtǐ xiàluò de dìnglǜ. The teacher is explaining the law of falling objects. 这条物理定律很难理解。 Zhè tiáo wùlǐ dìnglǜ hěn nán lǐjiě. This law of physics is hard to understand.