Definitions:

1. a feeling of low spirits noun
   • I felt responsible for my friend's lowness of spirits.
2. a low or small degree of any quality, for example amount, force, or temperature noun
   • I took advantage of the lowness of interest rates to buy stocks.

Synonyms:

• dejectedness
• dispiritedness
• downheartedness
• low status
• low-spiritedness
• lowliness