building block

American  

noun

1. block.

2. one of a set of cube-shaped blocks used by children to make simple constructions.

3. a basic element or component.

   the building blocks of proteins.

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building block British  

noun

1. a block of stone or other material, larger than a brick, used in building

2. a component that fits with others to form a whole

   standardized software building blocks

3. another name for (the child's toy) block

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Etymology

Origin of building block

First recorded in 1840–50

Example Sentences

Cheap, reliable exchange-traded funds are a basic building block of investing.

From The Wall Street Journal • May 22, 2026

It will be a building block and a key ingredient in every new “unicorn” — a company with a valuation of at least $1 billion.

From MarketWatch • Apr. 21, 2026

"This Picasso initiative is one more building block so that one day Alzheimer's will be nothing more than a bad memory," the foundation's head Olivier de Ladoucette said, the AFP news agency reported.

From BBC • Apr. 14, 2026

That extra building block can expand their biochemical capabilities.

From Science Daily • Feb. 28, 2026

Using sun-dried brick as a basic building block, the Mesopotamians devised complex cities centered around the temple.

From "The Annotated Mona Lisa" by Carol Strickland and John Boswell

Related Words

• constituent
• ingredient