(noun)
the theoretical framework or way of thinking for a particular discipline or school of thought, which is then used to formulate laws, generalizations, theories, and experiments within the discipline;
e.g. His work formed the basis of a new paradigm in the field of chemistry.
(noun)
a set of all of the forms of a particular word (a noun, verb, or adjective), which is then used as a grammatical/linguistic model for other similar words;
e.g. The teacher instructed them to write out the paradigm for the word they had been given.