Definition of "by chance" []

• Accidental(ly) or unexpected(ly). (phrase)

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• "Well, de Bono suggested that to solve a problem, the thinker should relate the problem at hand to a random input, such as a word chosen by chance in a dictionary, and then see if he can, by connecting the two, open up a new approach to the situation."
• "Terse enough so if by chance it had gone astray it might intrigue, but not give them away."
• "The co-occurrence of the events is typically highly improbable—meaning that the probability of their occurring, in sequence by chance alone, is very small if not minuscule."