Can I Use Connotation In A Sentence?

The connotation essentially relates to how anything may be associated with a word or phrase, for example, an implied value judgment or feelings. 

 
• A stubborn person may be described as being either strong-willed or pig-headed. Although these have the same literal meaning (i.e. Stubborn), strong-willed connotes admiration for the level of someone's will, while pig-headed connotes frustration in dealing with someone.

Yes you can use connotation in a sentence..

Example: The movie was cool.. "Cool" doesnt really refer to the temperature... But you get me... And thats called connotation {:o)