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Rarerule of thumb
The correct spelling is rule of thumb.
How to pronounce rule of thumb
noun
Say it like: Rul-e o-f t-hum-b
The correct spelling is rule of thumb. A general guideline, rather than a strict rule; an approximate measure or means of reckoning based on experience or common knowledge. For example: "The usual rule of thumb says that to calculate when an investment will double, divide 70 by the interest rate."
Usage Examples
“The usual rule of thumb says that to calculate when an investment will double, divide 70 by the interest rate.”
“I made a quick, rule-of-thumb estimate of the manhours required for the job.”
Definition
noun
- 1.A general guideline, rather than a strict rule; an approximate measure or means of reckoning based on experience or common knowledge.
- 2.(usually hyphenated) Approximated, guesstimated.
Similar words
Words related in meaning — check their spelling too.