Sometimes we use an indirect reference to explain something like bovine, blonde, dusky....
When words like the above examples are used in a sentence to bring about a meaning in addition to its primary meaning is what is called connotation.
When the word and the literal meaning is same, it is called denotation.
1)an association or idea suggested by a word in addition to its primary meaning.
2) The sum of what a word implies.
1) the actual literal meaning.
Connotation--> slow/ dull-witted.
Denotation --> cow/ anything related to cow.
Connotation--> something which carries an air of mystery.
Denotation---> dark complexion.