Merriam-Webster’s Essential Learner’s English Dictionary - For ESL, EFL, ELL, & TEFL Study & Instruction
<ul> <li>More than 54,000 words and phrases</li> <li>Coverage of both U.S. and British English and their differences</li> <li>More than 15,000 idioms, collocations, and commonly used phrases from American and British English</li> <li>Clarifies definitions with over 74,000 example sentences and phrases</li> <li>Usage guidance through extensive labeling (<i>old</i> <i>fashioned, technical, informal, humorous, </i>etc.); glosses (restatements to explain example phrases); count and non-count labeling; usage notes; and usage paragraphs</li></ul>