From Longman Dictionary of Contemporary Englishdeerdeer /dɪə $ dɪr/ ●●○ noun (plural deer) [countable] 
HBAHBAa large wild animal that can run very fast, eats grass, and has horns
HBAHBAa large wild animal that can run very fast, eats grass, and has hornsExamples from the Corpus
deer• A deer makes tracks in the snow.• They're deer-stealers - I saw a dead deer in their car.• The Qawrighul people hunted deer, wild sheep and birds, and fished.• We still have lots of deer, very little water and not many open spaces.• I heard wild turkeys gobbling and saw white-tailed deer.• Normally he's in charge of the deer, but all the staff double as guides.• It is framed by gentle hills that look down on oak groves that abound with deer, bobcats and golden eagles.Origin deer Old English deor “animal” 