1. • noun - (nontechnical usage) a tiny piece of anything
   • noun - a body having finite mass and internal structure but negligible dimensions
   • noun - a function word that can be used in English to form phrasal verbs
2. • A very small piece or part; a tiny portion or speck.
   • A very small or the smallest possible amount, trace, or degree: not a particle of doubt.
   • Physics.
   • A body whose spatial extent and internal motion and structure, if any, are irrelevant in a specific problem.
   • An elementary particle.
   • A subatomic particle.
   • Grammar & Linguistics.
   • An uninflected item that has grammatical function but does not clearly belong to one of the major parts of speech, such as up in look up or to in English infinitives.
   • In some systems of grammatical analysis, any short function word, including articles, prepositions, and conjunctions.
   • Roman Catholic Church.
   • A small piece of a consecrated host.
   • One of the smaller, individual hosts.
   • A small division or section of something written, such as a clause of a document.
3. • n - a very small piece or part

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