Princeton's WordNet

1. Commonwealth of Independent States, CIS(noun)

   an alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991

Wiktionary

1. cis(Adjective)

   Having two mutations on two genes on the same chromosome of a homologous pair.

2. cis(Adjective)

   Of the side of the Golgi apparatus nearer to the endoplasmic reticulum.

3. cis(Adjective)

   (properly cis-) Describing a double bond in which the greater radical on both ends is on the same side of the bond.

4. cis(Adjective)

   Cisgender or cissexual: not trans (transgender or transsexual).

Origin: From cis.

The New Hacker's Dictionary

1. CIS

   Hackerism for ‘CIS’, CompuServe Information Service. The dollar sign refers to CompuServe's rather steep line charges. Often used in sig blocks just before a CompuServe address. Syn. Compu$erve.

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