Other forms: deers
A deer is a gentle forest animal, and the male grows big branching horns. A herd of deer, a red deer, deer in the headlights.
The antlers are grown and shed every year, which is unusual — horns are permanent and antlers are not. Deer is the same in the singular and plural. Note that the Old English word simply meant an animal of any kind, and narrowed to this one, which is why German Tier still means animal.
1noundeerA hoofed forest animal, the male often antlered.
“A deer ran across the road in front of our car.”
deer is an animal.
Old English deor meant any animal. German Tier still means animal, and the English word narrowed to one species.
Proto-Indo-European
*dʰewsóm — living thing
Proto-Germanic
*deuzą
Proto-West Germanic
*deuʀ
Old English
dēor — animal
Middle English
der
English, today
deer
Built from
From Middle English der, deer (“animal, deer”), from Old English dēor (“animal”), from Proto-West Germanic deuʀ, from Proto-Germanic deuzą, from Proto-Indo-European dʰewsóm (“living thing”), from dʰéws (“breath”), full-grade derivative of dʰwes-. Cognate with Scots deer (“deer”), frr dier (“animal, beast”), West Frisian dier (“animal, beast”), Dutch dier (“animal, beast”), German Low German Deer, Deert (“animal”), German Tier (“animal, beast”), Swedish djur (“animal, beast”), Danish, Norwegian Bokmål and Norwegian Nynorsk dyr (“animal, beast”), Icelandic dýr (“animal, beast”). Related also to Albanian dash (“ram”) (possibly), Lithuanian daũsos (“upper air; heaven”), Lithuanian dùsti (“to sigh”), Russian душа́ (“breath, spirit”), Lithuanian dvė̃sti (“to breathe, exhale”), Sanskrit ध्वंसति (“he falls to dust”).
Etymology from Wiktionary, CC BY-SA