Meanings
Sy1
noun
- abbreviationastronomyAbbreviation of Seyfert galaxy, a type of AGN class of active galaxy.
proper noun
- alternativeAlternative form of Si.
Sy2
proper noun
- A Chinese Filipino surname from Spanish
SY3
nounSY (plural SYs)
plural SYs
- abbreviationinitialismInitialism of steam yacht: a steam-powered yacht.
- abbreviationinitialismInitialism of sailing yacht: a wind-powered yacht.
- abbreviationinitialismInitialism of school year.
Synonyms & antonyms
Also see
Origin
Rhymes & wordplay
Rhymes with Sy
All rhymes →Sounds the same
Cite this entry
APA
Sy. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Sy
MLA
“Sy.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Sy. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “Sy,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Sy.
Source: Sy on Wiktionary, CC BY-SA 4.0.