EVP is an online vocabulary reference tool that categorises vocabulary items according to their CEFR level: A1, A2, B1, B2, C1 or C2.
It gives the pronunciation, part of speech, definition (in learner-friendly language from the Cambridge learner dictionaries), and at least one example sentence.
You have to register, but it's free.
There is a basic search function, and also an Advanced search that allows you to set a combination of filters to refine your search - for example, for adjectives describing people at B1 (intermediate) level.