(medicine) Initialism of glomerulonephritis.

(Internet, text messaging) Initialism of good night.

(text messaging, Internet slang) Abbreviation of good night.

Initialism of grape neutral spirit (“vinous alcohol”). / Initialism of grain neutral spirit. / Initialism of glucosamine (N-acetyl)-6-sulfatase.

(computing, copyright law) Initialism of GNU Free Documentation License.

The blue wildebeest (Connochaetes taurinus)

(transitive, intransitive) To bite something persistently, especially something tough. / (intransitive) To produce excessive anxiety or worry. / To corrode; to fret away; to waste.

the act of gnawing

(economics) Initialism of gross national product.

The Free Software Foundation's project to develop a free UNIX-like operating system, including the legal framework, such as the source code and documentation licenses.