Attributions
Merriam-Webster
Definitions from Merriam-Webster come from Merriam-Webster's Collegiate® Dictionary with Audio, by Merriam-Webster Inc., through the Merriam-Webster Dictionary API.
Wiktionary
Definitions from Wiktionary are adapted from entries of Wiktionary, the free dictionary, written by its contributors. Each entry's history there lists its authors, and a word fetched from Wiktionary links to its entry as its Source.
That text is available under the Creative Commons Attribution-ShareAlike 4.0 International License. It is changed here: only the definitions of an entry's English section are shown, or of its Translingual section when it has no English one, as plain text without their links and formatting. The definitions as shown here are available under the same licence.