English Reference
noun

buck

n.
US /ˈbək/ UK /bˈʌk/ buck UK spelling bucked, bucking

  1. 01 B2 Upper Intermediate

    a male deer. The word is also used for the male of some other animals, such as antelopes, rabbits, goats, and hares.

    the male of certain mammals — chiefly deer, but also antelope, rabbit, hare, and goat.

    Simple

    A large buck stepped out of the trees.

    In context

    During the rut, a dominant buck fights off rival males to defend a group of does.

  2. 02 C1 Advanced Informal

    an informal word for a dollar, especially in American English. You might hear someone say something costs 'ten bucks'.

    an informal term for a unit of currency, most frequently the United States dollar; also common in Australian and Canadian English.

    Simple

    This coffee costs five bucks.

    In context

    The entrepreneur's first venture was funded with a thousand bucks borrowed from family.

But which greens are giving you the most nutritional bang for your buck?

The Guardian· 14 Aug 2026

Oil companies are making big bucks these days.

The Conversation· 12 Aug 2026
This entry
Level C1 · Advanced
Frequency Common
Updated