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rule of thumb▼◼◼◼(general guideline rather than a strict rule)noun[UK: ruːl əv ˈθʌm] [US: ˈruːl əv ˈθʌm]
as a rule▼◼◼◼(in general; most often)adverb[UK: əz ə ruːl] [US: ˈæz ə ˈruːl]
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