rule of thumb

noun phrase

1

: a method of procedure based on experience and common sense

2

: a general principle regarded as roughly correct but not intended to be scientifically accurate

Examples of rule of thumb in a Sentence

Recent Examples on the Web

Another simple rule of thumb for leaders is to shift from tracking your own achievements to being as generous as possible with credit, while also being accountable when things go wrong. — Carol Geffner, Forbes.com, 29 Sep. 2026

One rule of thumb is to always choose somewhere displaying the VPN sign outside—this stands for Verace Pizza Napoletana, and guarantees that the pizza will be made according to an exacting set of criteria. — Nicky Swallow, Condé Nast Traveler, 27 Sep. 2026

Interior stylist and vintage expert Leah Ashley has a good rule of thumb. — Felicia Feaster, Martha Stewart, 27 Sep. 2026

My rule of thumb is to pack two pairs—and never more than three. — Lydia Mansel, Travel + Leisure, 24 Sep. 2026

Word History

First Known Use

circa 1658, in the meaning defined at sense 1

Rhymes for rule of thumb

• abomasum
• become
• checksum
• humdrum
• income
• outcome
• pisum
• succumb
• therefrom
• wherefrom
• bum
• chum

Kids Definition

rule of thumb

1

: a method based on experience and common sense

2

: a general principle that is roughly correct