This is a PDF file but if you would like to edit it, message me and I can send you another file type! These are a mixture of my student friendly definitions and textbook definitions with pictures/descriptions of each word!
There are roughly 45 words here from the 1st semster of the school year, I have another set of 45 for the 2nd semester also at https://www.teacherspayteachers.com/Product/7th-Grade-Math-Vocabulary-2-2164797
I printed these double sided as we learned them and hung them from my ceiling! You could also post them around the classroom or print them as flashcards for students to study.