What does cognition mean?
Cognition refers to the full range of mental processes by which human beings — and other animals — acquire, process, store, and use information. It encompasses perception, attention, memory, language, reasoning, problem-solving, and decision-making. The term is central to psychology and cognitive science, where researchers study how these processes work together to produce intelligent behaviour, and it also has a long history in philosophy as a name for the faculty of knowing itself. In ordinary usage, cognition is a formal, somewhat clinical word: one might read that a drug improves cognition, that sleep deprivation impairs it, or that social cognition governs how we interpret other people's behaviour. Its derivatives, such as 'cognitive' and 'cognitively', are far more common in everyday English, appearing everywhere from education ('cognitive development') to marketing ('cognitive load'). Understanding cognition means understanding the machinery of thought itself.
The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.
"The study examined how bilingualism affects cognition across the lifespan."
Chiefly used in academic and scientific contexts; often modified by adjectives such as 'human', 'social', or 'higher'.
In philosophy, the act or faculty of knowing, considered as distinct from feeling and willing.
"Kant distinguished cognition from mere sensation, insisting that understanding actively organizes experience."
This sense is largely confined to philosophical and historical discussion of epistemology.
The plural is rare and mostly confined to psychology, where it may refer to individual thoughts or mental events (e.g., in cognitive behavioural therapy). In most contexts cognition is treated as an uncountable mass noun.
"Negative cognitions about oneself are a hallmark of depressive thinking."
Every time you remember a face, solve a puzzle, or daydream, you're running the same machinery scientists call cognition — the word comes from Latin 'cognoscere', meaning 'to get to know'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cognition
Cognition derives from the Latin verb 'cognoscere', meaning 'to become acquainted with' or 'to get to know', formed from 'co-' (together) and 'gnoscere' (to know), which itself traces back to the Proto-Indo-European root *gnō-. The noun entered English in the late Middle Ages via Old French and Latin philosophical vocabulary, becoming established in scholastic and later psychological writing. It shares this ancient root with a wide family of English words including 'recognize', 'cognate', 'cognizant', and 'diagnosis' (via Greek), all carrying the core idea of knowing.
Related word forms
How cognition is actually used
Cognition is a formal, largely academic term used chiefly in psychology, neuroscience, philosophy, and cognitive science. It is rarely used in casual conversation, where words like 'thinking' or 'understanding' are preferred. It typically appears in technical discussions of mental function rather than everyday speech.
Easily confused with cognition
Cognition refers to the mental processes of thinking and knowing, while cognizance means awareness or notice of something (as in 'take cognizance of').
Recognition is the act of identifying or acknowledging something previously known, whereas cognition is the broader process of acquiring and processing knowledge.