There are some good, regular dictionaries for English language learners – including the Learner’s Dictionary, which explains 100,000 words and phrases in simple language, with sentence examples, and pronunciation.
However, there are many times when some pictures will help you understand a word better, and more quickly. Perhaps the easiest way to see a word in pictures is with Google Images. Here are some examples of words that are easier to understand with a picture, or a set of pictures…
This comes from Easy Pace Learning, where there is more information like this.
Here’s a much longer list of Halloween words – with definitions.
From the English For Beginners website (with many words changed to American English)
More pictures like this on English for Beginners
More at English for Beginners