Cite Them Right referencing style:
When quoting a definition from a dictionary, use the reference guidelines for Reference Books and Online reference books.
The requirements of in text citation are: the author of the entry, if available, or the title of the entry and the Year. For Example: “Spielbergian” (2018)
The suggested elements for a reference are: 'Title of entry' (Year of publication) Title of book. Available at: URL (Accessed: date).
Example:
‘Spielbergian’ (2018) Oxford English dictionary. Available at: http://www.oed.com/view/Entry/69512583. (Accessed: 21 June 2021).