noun a fit of anger; choler.
2. spleen ·vt to dislke.
3. spleen ·noun melancholy; hypochondriacal affections.
4. spleen ·noun a fit of immoderate laughter or merriment.
5. spleen ·noun a sudden motion or action; a fit; a freak; a whim.
6. spleen ·noun anger; latent spite; ill humor; malice; as, to vent one's spleen.
7. spleen ·noun a peculiar glandlike but ductless organ found near the stomach or intestine of most vertebrates and connected with the vascular system; the milt. its exact function in not known.