mor ‧ pheme /ˈmɔːfiːm $ ˈmɔːr-/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: French ; Origin: morphème , from Greek morphe 'form' + English -eme (as in phoneme) ]
technical the smallest unit of meaning in a language. The words ‘so’, ‘the’, and ‘boy’ consist of one morpheme. ‘Boys’ consists of two morphemes, ‘boy’ and ‘s’:
the past tense morpheme
the plural morpheme