| designating a company, or a mutual fund that invests in companies, with a market capitalization of between $1 billion and $5 billion. |
mid·cap  (mĭd'kāp') adj.
[mid- + cap3.] |
mid-cap
Of or relating to the common stock of a company with a middle level of market capitalization, usually within the range of $2 billion to $10 billion, although the cutoff points are fuzzy on both ends.
Of or relating to a mutual fund that holds mostly mid-cap stocks.