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  1. Dictionary
    certain
    /ˈsəːt(ɪ)n/

    adjective

    pronoun

    • 1. some but not all: "certain of his works have been edited"

    More definitions, origin and scrabble points

  2. 1 day ago · The Indian Contract Act, 1872 [1] prescribes the law relating to contracts in India and is the key act regulating Indian contract law. The Act is based on the principles of English Common Law. It is applicable to all the states of India. It determines the circumstances in which promises made by the parties to a contract shall be legally binding.

  3. en.wikipedia.org › wiki › Atomic_clockAtomic clock - Wikipedia

    1 day ago · The SI second is defined as a certain number of unperturbed ground-state hyperfine transitions of the caesium-133 atom. Caesium standards are therefore regarded as primary time and frequency standards. Caesium clocks include the NIST-F1 clock, developed in 1999, and the NIST-F2 clock, developed in 2013.