Definition of definition

    1
    :  an act of determining; specifically :  the formal proclamation of a Roman Catholic dogma

    2
    a :  a statement expressing the essential nature of somethingb :  a statement of the meaning of a word or word group or a sign or symbol <dictionary definitions>c :  a product of defining

    3
    :  the action or process of stating the meaning of a word or word group

    4
    a :  the action or the power of describing, explaining, or making definite and clear <the definition of a telescope> <her comic genius is beyond definition>b (1) :  clarity of visual presentation :  distinctness of outline or detail <improve the definition of an image> (2) :  clarity especially of musical sound in reproductionc :  sharp demarcation of outlines or limits <a jacket with distinct waist definition>