Improving your vocabulary can be done at any age and any level of education. Even college students can benefit from an enlarged vocabulary, which will enhance spoken and written communication as well as providing a deeper grasp of any language. Often people are spurred to improve their vocabularies by a major test, but improving your vocabulary can be done for fun as well. There are a variety of ways to improve your vocabulary, most of which are interactive and easy.
One of the best ways to improve your vocabulary is to read more. Reading is clearly linked with a larger vocabulary, especially if you seek out books in unfamiliar genres or about unfamiliar topics. Nonfiction in a wide variety of fields can improve your vocabulary and general knowledge. Literacy in fiction is also highly beneficial. As you read, make a note of unfamiliar words, look them up, and write down the definition.