This addition would be very simple since there exist APIs like William Whitaker’s Words and Lewis & Short (digitized by Perseus) for fetching word definitions. There is also a wealth of material on the Dickenson and Perseus websites that can be easily pasted in. You could potentially expand this to Ancient Greek, which has a digitized LSJ dictionary and also easy-access texts on Perseus.
I’m not sure if this is the place here, but perhaps a content library tab would aid people in finding material? In this case, Perseus relies on digitized text which can be imported as easily as loading from a GitHub link.