Of, resembling, relating to, or consisting of a name or names. Assigned to or bearing a person's name: nominal shares. Existing in name only. Philosophy Of or relating to nominalism. Insignificantly small; trifling: a nominal sum. Business Of, relating to, or being the amount or face value of a sum of money or a stock certificate, for example, and not the purchasing power or market value. Business Of, relating to, or being the rate of interest or return without adjustment for compounding or inflation. Grammar Of or relating to a noun or word group that functions as a noun. Aerospace & Engineering According to plan or design: a nominal flight check. Grammar A word or group of words functioning as a noun.