Meaning : Not likely to be true or to occur or to have occurred.
Example :
Legislation on the question is highly unlikely.
An improbable event.
Synonyms : improbable
Meaning : Has little chance of being the case or coming about.
Example :
An unlikely story.
An unlikely candidate for reelection.
A butcher is unlikely to preach vegetarianism.
Has a good chance of being the case or of coming about.
These services are likely to be available to us all before long.Meaning : Having a probability too low to inspire belief.
Synonyms : improbable, unbelievable, unconvincing