adj

• (historical) Of or related to the former republic of Venice and its colonial empire around the Adriatic and eastern Mediterranean Seas.
• (linguistics) Of or related to Venetan, the language spoken in Veneto, or more specifically the Venetian dialect spoken in the city itself.
• (uncommon) Synonym of Venetic, of or related to Veneto, the Italian region around the city.
• (historical, uncommon) Synonym of Venetic, of or related to the Veneti, either of two unrelated tribes of ancient Europe.

noun

• (colloquial) A Venetian blind.
  "Ladies are usually conveyed about Calcutta, or any where for short distances, in a kind of palanquin, called a boҫhah... Its deep shape, and its seat, much resemble the [English sedan chair]; but having two doors, one on each side, with one window in front, as well as a small one behind, all furnished with Venetians and glasses, give it, in those respects, some claim to alliance with the [chariot]."
• (obsolete, in the plural) Galligaskins.
• (obsolete) Synonym of sequin (“type of gold coin”).

noun

• (usually in the plural) Ellipsis of Venetian blind or alternative letter-case form of Venetian.
  "Stewart has lately made two for the King of Tanjore's sons, which, it is said, will cost near 10,000 Rs. each. They are Mahanas... with venetians, etc., etc. Bedding and Pillows of velvet as the Lining."