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an ability to understand the meaning or importance of something (or the knowledge acquired as a result); "how you can do that is beyond my comprehension"; "he was famous for his comprehension of American literature"
(of a government or government official) holding an office means being in power; "being in office already gives a candidate a great advantage"; "during his first year in office"; "during his first year in power"; "the power of the president"
establish the validity of something, as by an example, explanation or experiment; "The experiment demonstrated the instability of the compound"; "The mathematician showed the validity of the conjecture"
become different in some particular way, without permanently losing one's or its former characteristics or essence; "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season"