1.Definition: 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
2.Definition: of or involving the mouth or mouth region or the surface on which the mouth is located
"The oral cavity", "The oral mucous membrane", "The oral surface of a starfish"
3.Definition: of or relating to or affecting or for use in the mouth
"Oral hygiene", "An oral thermometer", "An oral vaccine"
4.Definition: using speech rather than writing
"An oral tradition", "An oral agreement"