What is synonym and its example?

definition : one of two or more Words or expressions of the same language that have the same or nearly the same meaning in some or all senses

example :

synonyms for example as a noun - case, exemplar, illustration, instance, representative, sample, specimen
Synonym is the meaning of a Word which is expressed by different Word or Words. For example: synonyms of the Word "calm" are cool, bland, pacific, halcyon, placid, quiet etc. Example is a Word or collection of Words or sentence or sentences that depicts or explains meaning of a Word. Look at the Words above that I used to explain the meaning of "calm" to understand what an example is.