Lexeme

Definition

A lexeme is the fundamental unit of a language's vocabulary, abstracted away from its inflected forms. RUN, RUNS, RAN, and RUNNING are all forms of a single lexeme, conventionally written RUN. Dictionaries are organized by lexeme, listing each headword once and covering its variants.

Why it matters

Thinking in lexemes helps you see that many surface words share one root, which compresses vocabulary learning and clarifies how answer lists are curated toward base forms rather than every inflection.

Examples

• GO, GOES, WENT, GONE — all the same lexeme.
• Dictionaries list 'run' once though it has many forms.

Best practices

• Learn the base lexeme; its forms usually follow regular rules.
• Group related forms mentally to reduce memorization load.

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