Cid

¹ American  

[sid, theed] / sɪd, θid /

noun

1. The, El Cid CampeadorRodrigo Díaz de Bivar, c1040–99, Spanish soldier: hero of the wars against the Moors.

2. (italics) Le. Le Cid.

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c.i.d. ² American  

Or cid,

abbreviation

Automotive.

1. cubic-inch displacement: the displacement of an engine measured in cubic inches.

   My old car had a 302 c.i.d. engine.

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C.I.D. ³ American  

abbreviation

1. Criminal Investigation Department of Scotland Yard.

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CID ¹ British  

abbreviation

1. (in Britain) Criminal Investigation Department; the detective division of a police force

2. cruel, inhumane, and degrading: denoting the brutal and demeaning treatment of prisoners

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Cid ² British  

/ sɪd, θið /

noun

1. El or the. original name Rodrigo Diaz de Vivar. ?1043–99, Spanish soldier and hero of the wars against the Moors

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Etymology

Origin of C.I.D.

First recorded in 1900–05

Example Sentences

“Traveling offseason is one of the easiest ways seniors can stretch their travel budget,” advises Melissa Cid, a consumer savings expert at MySavings.com.

From MarketWatch • Feb. 18, 2026

He is married to Lissette del Cid, with whom he has three daughters and three grandchildren.

From Barron's • Dec. 24, 2025

The indie band, which was nominated for a Mercury Prize in 2020, is set to play in Los Angeles on Dec. 11 at El Cid and in Palm Springs on Dec. 15.

From Los Angeles Times • Dec. 4, 2024

Newport Harbor was trying to avenge a 28-12 defeat to Orange Lutheran on Aug. 24, and the Sailors scored on their first possession on Helmar’s five-yard strike to Skylie Cid.

From Los Angeles Times • Nov. 9, 2024

Cid who was the hand of chance, and luck, and fate.

From "The Many Assassinations of Samir, the Seller of Dreams" by Daniel Nayeri