What is the meaning of Gleet?

Stomach mucus, especially of a hawk.

Any slimy, viscous substance.

A urethral discharge, especially as a symptom of gonorrhea.

To ooze, as gleet (noun sense); to flow in a thin, limpid humour.

Of water: to flow slowly.

Stomach mucus, especially of a hawk.

Any slimy, viscous substance.

Source: wiktionary.org