say it: di-SURN
discern is a verb meaning "detect with the senses". It carries one recorded sense.
detect with the senses
“The fleeing convicts were picked out of the darkness by the watchful prison guards”
“I can't make out the faces in this photograph”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for discern come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.