The definition of deem is to believe or judge.(verb)
An example of deem is thinking a child has done something wrong when they have a guilty look on their face.
See deem in Webster's New World College Dictionary
transitive verb, intransitive verb
Origin: ME deman < OE deman, to judge, decree < base of dom, doom
See deem in American Heritage Dictionary 4
verb deemed, deem·ing, deems verb, transitive
Origin: Middle English demen
Origin: , from Old English dēman; see dhē- in Indo-European roots.
Learn more about deem