doz·en 
/ˈdʌzn̩/ noun
plural doz·ens or dozen /ˈdʌzn̩/ noun 1 plural dozen [count] : a group of 12 people or things
▪ a dozen eggs [=12 eggs] ▪ half a dozen eggs = a half-dozen eggs [=six eggs] ▪ two dozen roses [=24 roses] ▪ We'll need a couple dozen hot dogs for the party. [=we will need about 24 hot dogs] ▪ A few dozen people were at the party. [=about 36 people were at the party] ▪ She has published several dozen [=many, probably more than 36] poems. — see also baker's dozen 2 dozens [plural] : large numbers of people or things
▪ People entered the park by/in the dozens. [=large groups of people entered the park] — often + of ▪ Dozens of [=many] people were at the park. ▪ The shop sells dozens and dozens of [=very many] kinds of tea.
▪ a dozen eggs [=12 eggs] ▪ half a dozen eggs = a half-dozen eggs [=six eggs] ▪ two dozen roses [=24 roses] ▪ We'll need a couple dozen hot dogs for the party. [=we will need about 24 hot dogs] ▪ A few dozen people were at the party. [=about 36 people were at the party] ▪ She has published several dozen [=many, probably more than 36] poems. — see also baker's dozen
▪ People entered the park by/in the dozens. [=large groups of people entered the park] — often + of ▪ Dozens of [=many] people were at the park. ▪ The shop sells dozens and dozens of [=very many] kinds of tea.
a dime a dozen — see dime
six of one, half a dozen of the other — see six
