plural building blocks
: an important part that is grouped together with many other similar things to form something larger
—usually plural —usually + of
Families are the building blocks of our society.
Cells are the building blocks of the body.
Cite this Entry
“Building block.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/building%20block. Accessed 24 Jul. 2026.
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