This New Edition is an indispensable teaching tool for non-native speaking students wishing to master spoken and written English. With hundreds of new words and meanings, this Learner's Dictionary offers a complete and essential reference guide by America's foremost language experts. This new edition defines 100,000 words and phrases in plain English that is easy for learners to understand. It highlights 3,000 core vocabulary words - underlined in blue - that are essential for students to learn. 160,000 example sentences - the most of any learner's dictionary - clarify meanings and are highlighted in blue for easy reading. Perfect for ESL, EFL, ELL, TEFL, TOEFL and TOEIC study and instruction. In-depth coverage of American English grammar and usage is also offered.