Definition of trivial

• (informal) small and of little importance; "a fiddling sum of money"; "a footling gesture"; "our worries are lilliputian compared with those of countries that are at war"; "a little (or small) matter"; "a dispute over niggling details"; "limited to petty enterprises"; "piffling efforts"; "giving a police officer a free meal may be against the law, but it seems to be a picayune infraction"
• obvious and dull; "trivial conversation"; "commonplace prose"
• of little substance or significance; "a few superficial editorial changes"; "only trivial objections"