first law

noun

: the most important principle
He teaches his students that balance is the first law of architecture.

Examples of first law in a Sentence

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DeKalb County Police Officer David Rose, who was one of the first law enforcement officers to respond, was killed. Brenda Goodman, CNN Money, 7 Aug. 2026 Now, the first law of thermodynamics — which states the energy of a closed system cannot be created or destroyed but rather can only change forms — can be applied to black holes even when they are involved in dynamic acts. Robert Lea, Space.com, 16 July 2026 Progressives also promoted the nation’s first laws to protect the environment. Mark Brilliant, Mercury News, 9 July 2026 In 1643, Connecticut signed one of the first laws requiring local officials to assist in capturing enslaved runaways. Calista Oetama, Hartford Courant, 22 June 2026 See All Example Sentences for first law

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“First law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/first%20law. Accessed 14 Aug. 2026.

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