This deck was created by my open-source LexiDeck software, which you can find here: https://github.com/wjrm500/LexiDeck.
It was created by taking the words found in the Anki deck "A Frequency Dictionary of Spanish", which contains ~5,000 Spanish words, and for each word fetching definitions and example sentences from the online dictionary SpanishDict. Notes are only created for the "principal" definitions, i.e., the large, hyperlinked definitions that sit immediately underneath the word being translated, and one note is created for each part of speech (e.g., adjective, noun, verb) to minimise ambiguity.