Connotation is the action and the effect of connote (implying, in addition to its significance, one of type salutation or expressive). The connotation of a word or phrase suggests a sense added and different to his own.
Examples: "I find that this announcement has a sexist connotation", "the speech of the president appeared to address to the audience, although many analysts have warned other connotations", "If you make addresses to your boss, people will think that your words have a special connotation", "is not looking for connotation where it does not exist.
The connotation implies that the language has meanings that go beyond the literal sense. We can say that a man is a lion because there a lot of strength and courage, even if this person does not have the same physical or biological characteristics that the animal in question.
We can say that the connotation is the secondary value of an expression or a Word. The image of a rose can connote the love, enthusiasm or passion, which are meanings that have nothing to do with the literal definition of this flower, but with what it represents or symbolizes culturally.
The expression "to suffer like a dog" or "treat like a dog" is another example of connotation. If a person says to another she "suffered like a dog", it refers to a high degree of suffering. This does not mean that the unfortunate sleep on the ground and drink of water in a bowl, or that all dogs have a life of suffering.