Definitions

1. adjective

relating to or resembling serum, especially the fluid part of blood

“The doctor examined the serous fluid leaking from the wound.”

2. adjective

causing or characterized by excessive crying or weeping

“Her emotional outburst was a serous display of grief.”

3. noun

a condition or situation causing or characterized by excessive crying or weeping

“The patient was diagnosed with a serous case of depression.”