There are only two remaining “unabridged” dictionaries of English that have editorial teams keeping them up to date. They are the Merriam-Webster Unabridged and the Oxford English Dictionary, 3rd edition. Both are (for obvious reasons) behind paywalls. The links here point only to dictionaries you can consult for free. Other than Wiktionary, they are at best sporadically updated.
Wiktionary is well known. Some players of the game have a poor opinion of it, that it does not deserve. It is true that Wiktionary is crowdsourced (but, much of the OED was crowdsourced) and it is widely believed that you can add any made-up word, because it is a wiki. The players who believe that have obviously never tried to do it. If you propose a word and definition that is not properly backed up with evidence of contemporary usage, the editors will challenge it within 48 hours, and if you do not respond adequately to the challenge, they will remove your contribution. Wiktionary has stringent and clearly-stated criteria for inclusion, that it actively enforces in practice, and will deny a place to a contribution that it considers insufficiently supported. In some cases those criteria will exclude words that James Murray admitted to the OED.
Green’s Dictionary of Slang is comprehensive and recommendable.
The Collins Online Dictionary is the last representative of a series of very fine 20th-century printed dictionaries, the most recent of which appeared in 2003. For American usage, it is supplemented (in cut’n’paste fashion) by definitions drawn from American Heritage Dictionary, 2011 (5th) edition, Random House Dictionary, 2001 (2nd) edition, and Webster’s New World Dictionary (Cleveland), 2016 (5th) edition, all of which have ceased publication. It is said to have an editorial team keeping it up to date, and invites new word submissions from the public, but those submissions languish for years in the review queue.
Like Collins, Chambers' is the last of its line. The most recent printed edition is 2015. Very popular among word-game players, it was celebrated for the occasional flash of wit in its definitions, and inclusion of words that other one-volume dictionaries passed over.