Create your own dictionary data

TSV

The format is simple: word<tab>meaning

word1	this is word1
word2	this is word2
word3	this is word3

Import it.

That's all.

JSON

The format is simple: "word": "meaning"

{
  "word1": "this is word1",
  "word2": "this is word2",
  "word3": "this is word3"
}

Import it.

That's all.