trial and error

American  

noun

1. experimentation or investigation in which various methods or means are tried and faulty ones eliminated in order to find the correct solution or to achieve the desired result or effect.

---

trial and error British  

noun

1. a method of discovery, solving problems, etc, based on practical experiment and experience rather than on theory

   he learned to cook by trial and error

---

trial and error Cultural  

1. To “proceed by trial and error” is to experiment, rejecting what does not work and adopting what does.

---

trial and error Idioms  

1. An attempt to accomplish something by trying various means until the correct one is found. for example, The only way to solve this problem is by trial and error. The error here alludes to the failed means or attempts, which are discarded until the right way is found. [c. 1800]

---

Other Word Forms

• trial-and-error
  adjective

Etymology

Origin of trial and error

First recorded in 1800–10

Example Sentences

See Examples For:

trial and error

The feat followed trial and error that initially saw him mollycoddle corals in stress-free environments, but those easily perished in the ocean once transplanted.

From Barron's ● Jul. 29, 2026

Manufacturing HBM at scale requires expertise that must be built up over multiple iterations of trial and error.

From MarketWatch ● Jul. 18, 2026

Through repeated trial and error, the system learned to recognize meaningful patterns in the molecular structures.

From Science Daily ● Jul. 8, 2026

“There’s a little bit of trial and error as you go with that.”

From Los Angeles Times ● Jun. 19, 2026

Like anyone new to tradecraft, he learned by trial and error.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin