Sidney

UK: /ˈsɪdnɪ/ US: (sid′nē)

WordReference Random House Unabridged Dictionary of American English © 2025

Sid•ney  (sid′nē), n. 

1. Biographical Sir Philip, 1554–86, English poet, writer, statesman, and soldier.
2. Place Names a city in N Ohio. 17,657.
3. a male or female given name: a family name taken from a French placename, Saint Denis.

Also, Sydney (for defs. 1, 3).

Collins Concise English Dictionary © HarperCollins Publishers::

Sidney, Sydney / ˈsɪdnɪ/ noun

1. Algernon. 1622–83, English Whig politician, beheaded for his supposed part in the Rye House Plot to assassinate Charles II and the future James II: author of Discourses Concerning Government (1689)
2. Sir Philip. 1554–86, English poet, courtier, and soldier. His works include the pastoral romance Arcadia (1590), the sonnet sequence Astrophel and Stella (1591), and The Defence of Poesie (1595), one of the earliest works of literary criticism in English