SIS

sister, sis

(noun) a female person who has the same parents as another person; “my sister married a musician”

Source: WordNet® 3.1

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Noun

sis (plural sises or sisses)

(informal) Clipping of sister.

Synonyms

• (sister): sissy

Anagrams

• ISS, SSI

Proper noun

SIS

(British) Initialism of Secret Intelligence Service.

Initialism of Schengen Information System.

Synonyms

(Secret Intelligence Service)

• MI6, Six, 6

• Secret Intelligence Service

Noun

SIS (uncountable)

Initialism of second impact syndrome.

Initialism of snow immersion suffocation.

Anagrams

• ISS, SSI

Source: Wiktionary

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Sis, n.

Definition: A colloquial abbreviation of Sister.

Sis, n.

Definition: Six. See Sise. [Obs.] Chaucer.

Source: Webster’s Unabridged Dictionary 1913 Edition

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