ENGLISH
REFERENCE

mostly

adv.
US //ˈmoʊsɫi// UK //mˈəʊstli// most·ly
  1. 1 mainly or usually (adv.)
    A2 Elementary

    for the most part, or in most cases.

    chiefly or principally; used to indicate that a situation or quality applies to the majority of a group or time.

    Example

    The people at the party were mostly students from the local college.

    Example

    The local economy relies mostly on seasonal tourism, which leaves many businesses struggling during the colder winter months.

    Usage

    Typically placed before the adjective, adverb, or phrase it modifies, or after the verb 'to be'.
Origin

From most + -ly.

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