by definition

You are wondering about the meaning of the phrase by definition, maybe you heard it in a TV show, movie or theater play. Although this idiom is not used very often, it enriches your capacity of expression and strengthens communication. In which case is the expression by definition used and what is its meaning?

Meaning of "by definition"

Meaning

The phrase “by definition” is generally used to refer to something that is exactly as it is described, according to its dictionary definition or established set of rules. It implies that the thing being discussed is unambiguous and there is no room for misunderstanding. The phrase is often used to check that both parties in a conversation clearly understand each other.

Etymology

The phrase “by definition” has been used in the English language since at least the mid-19th century. It comes from the Latin phrase “de definitio” which translates as “of defining”. This phrase is thought to have been used to refer to a definition of a term or phrase and was used to express certainty in understanding.

Usage

The phrase “by definition” is used to make a statement more precise. For example, it can be used to show that something is definitively true, or that someone understands the exact definition of something. It can also be used to check that two people are discussing the same thing, or to say that a statement is true beyond a reasonable doubt.

Example Sentences

• I know what the word means ‘by definition’.
• By definition, a square is a four-sided shape with all sides equal.
• This must be done correctly ‘by definition’.

Idioms with similar meaning

"Don't judge a book by its cover" is an English idiom that means you shouldn't make assumptions about someone or something based solely on its appearance. In Japanese, the similar idiom is "Hana yori dango," which translates to "Dumplings rather than flowers." This idiom means that substance is more important than appearance.