A short form of the male given names Sidney and Siddhartha. / Alternative form of Syd (“unisex given name”). / A minor river in East Devon, England, which flows into the English Channel at Sidmouth.

(slang) sadiki

(computing, Microsoft Windows) Abbreviation of security identifier. / (computing) Sound Interface Device, a sound chip used in some early computers.

Eye dialect spelling of side.

(medicine) Acronym of sudden infant death syndrome.

Small Island Developing States.

plural of SID

Others' circumstances seem more desirable than one's own but in reality often are not.

A North American rattlesnake, Crotalus cerastes, that inhabits lowland deserts. / (slang) A person who is untrustworthy and dangerous.

(US) (usually) a paved footpath located at the side of a road, for the use of pedestrians / (US, by extension) any paved footpath, even if not located at the side of a road