What does chunking mean?
Chunking is the practice of dividing information, material, or tasks into smaller units — chunks — that are easier to remember, understand, or manage. The concept is best known from cognitive psychology, where George Miller's famous 1956 paper on the limits of short-term memory showed that people can hold only a handful of items at once, but that grouping items into meaningful clusters dramatically expands effective capacity. Remembering a phone number as three grouped blocks rather than ten isolated digits is a classic example. Beyond psychology, chunking is widely used in education and computing: teachers break lessons into digestible segments, and engineers split large texts or datasets into pieces for processing. The word is neutral in tone and common in both British and American English. Its enduring usefulness reflects a simple insight — structure turns an unmanageable mass of detail into something the mind can actually grasp.
nounThe process of breaking down information, text, or tasks into smaller, manageable units called chunks; in psychology, the grouping of individual pieces of information into larger meaningful units to aid memory and processing.
- (Psychology/cognitive science) The grouping of separate pieces of information into larger meaningful units so they can be held and processed more easily in memory.
- (Computing/education) The practice of breaking complex content, code, or data into smaller, self-contained segments for easier handling or learning.
- (Informal) The act of cutting or dividing something physical into chunks.
"Chunking the phone number into three groups made it much easier to remember."
"Skilled readers rely on chunking to absorb whole phrases at a glance rather than word by word."
"By chunking the project into weekly milestones, the team kept the workload from feeling overwhelming."
Your short-term memory holds only about four items at a time — but chunking lets you pack each item with far more than one fact.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of chunking
Chunking derives from 'chunk', a noun meaning a thick lump or substantial piece, which appeared in American English around the late 17th century. 'Chunk' itself likely arose as a variant or blend of 'chuck' and 'hunk', both words for lumps cut from something. The derived form 'chunking' came to prominence in twentieth-century cognitive science after psychologist George A. Miller popularized it in his influential 1956 work on memory capacity, and it has since spread into computing and everyday usage.
Related word forms
How chunking is actually used
The term is standard and neutral across registers, but it carries a distinctly technical flavour in psychology, education, and computing. It is almost always used as an uncountable mass noun.
Easily confused with chunking
'Chucking' means throwing or discarding something, whereas 'chunking' means dividing material or information into chunks.