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Wiktionary, the free dictionary

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Welcome to the English-language Wiktionary, a collaborative project to produce a free-content multilingual dictionary. It aims to describe all words of all languages using definitions and descriptions in English.
Wiktionary has grown beyond a standard dictionary and now includes a thesaurus, a rhyme guide, phrase books, language statistics and extensive appendices. We aim to include not only the definition of a word, but also enough information to really understand it. Thus etymologies, pronunciations, sample quotations, synonyms, antonyms and translations are included.
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Word of the day
for February 4
metastasize v (American spelling, Oxford British English)
  1. (transitive)
    1. (medicine, specifically oncology) Of a disease (especially cancer) or a tumour: to form a metastasis ("secondary focus away from the primary site") in (a body organ).
    2. (chiefly US, figurative) To disseminate or spread (something, often an undesirable thing), especially in a destructive manner.
  2. (intransitive)
    1. (medicine, specifically oncology) Of a disease (especially cancer) or a tumour: to undergo metastasis ("spreading from a primary site to one or more other sites in the body").
    2. (chiefly US, figurative) Of a thing, often one which is undesirable: to disseminate or spread, especially in a destructive manner.

Today is World Cancer Day, which is recognized by the United Nations to raise awareness of cancer and to encourage its prevention, detection, and treatment. The Charter of Paris against Cancer, an international convention which seeks to improve cancer treatment through better screening and patient support, and further research, was signed on this day in 2000.

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This is the English-language Wiktionary, where words from all languages are defined in English. For example, see the entry for the French word dictionnaire. To find a French definition of that word, visit the equivalent page in the French Wiktionary.

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