Definitions for "Bound morpheme"
Keywords:  morpheme, plural, tain, ness, hyphen
a morpheme that cannot stand alone as an independent word, as re-, -tain, and -er in retainer; formative. Cp. affix; free morpheme; root.
a morpheme that occurs only as part of a larger construction; eg an -s at the end of plural nouns
a grammatical unit that never occurs by itself, but is always attached to some other morpheme