Definition of "Oral" :

noun: an examination conducted by spoken communication

adjective: a stage in psychosexual development when the child's interest is concentrated in the mouth; fixation at this stage is said to result in dependence, selfishness, and aggression

adjective: of or involving the mouth or mouth region or the surface on which the mouth is located

"The oral cavity."

adjective: using speech rather than writing

"An oral tradition."

adjective: of or relating to or affecting or for use in the mouth

"Oral hygiene."