knight bachelor

from WordNet (r) 3.0 (2006)

knight bachelor
    n 1: a knight of the lowest order; could display only a pennon
         [syn: {knight bachelor}, {bachelor-at-arms}, {bachelor}]

from The Collaborative International Dictionary of English v.0.48

Knight bachelor \Knight" bach"e*lor\; pl. {Knights bachelors}.
   A knight of the most ancient, but lowest, order of English
   knights, and not a member of any order of chivalry. See
   {Bachelor}, 4.
   [1913 Webster]