/ ˈæləfəʊn; NAmE -foʊn/ noun
1.
( phonetics ) a sound that is slightly different from another sound, although both sounds belong to the same phoneme and the difference does not affect meaning. For example, the /l/ at the beginning of little is different from the /l/ at the end.
2.
( CanE ) a person who comes to live in Canada, especially Quebec, from another country, whose first language is neither French nor English
► allo·phone adjective :
Within French-speaking Quebec, anglophone, allophone and Aboriginal minorities also exist.
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WORD ORIGIN
1930s: from allo- other, different + phoneme .