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"

Related Adjective(s):buccal

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"

Related Adjective(s):unwritten