Website Scraping and Avoiding IP Blockage

I am building a dictionary app based on the appealing website vocabulary.com. I made a command line Java Program that entails the code for capturing word definitions from with every solid request. It worked successfully until I realized that my IP was blocked by the website and stopped getting data. I would like to figure out a way to gather my dictionary data within a scope of privacy where can get these elements without getting my IP address totally blocked.!
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You need to contact them and license their content.
http://www.thinkmap.com/contactus.jsp

This is explained in their Terms of Use which state:

1.3. Do not systematically retrieve content to create another product

thanks tim

I need to build a dictionary app, where would I need to go to get their definitions legally?

I’m not sure what their licensing may look like, I would use that contact link if you were interested in theirs specifically.

I searched Google briefly for an open source dictionary and found this which has a permissive license: https://wordnet.princeton.edu/

I looking for something similar to this at: OPTED v0.03 Letter A (anu.edu.au) but this one is two old.

A plaint text english dictionary

please check for your self if its too old.