/ ˌʌnˈlaɪk; NAmE / preposition , adjective
■ preposition
1.
different from a particular person or thing :
Music is quite unlike any other art form.
The sound was not unlike that of birds singing.
2.
used to contrast sb/sth with another person or thing :
Unlike most systems, this one is very easy to install.
3.
not typical of sb/sth :
It's very unlike him to be so late.
OPP like
■ adjective
[ not before noun ] ( of two people or things ) different from each other :
They are both teachers. Otherwise they are quite unlike.
—compare alike , like
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WORD ORIGIN
Middle English : perhaps originally an alteration of Old Norse úlíkr ; compare with Old English ungelīc not of the same kind, not comparable .