(1704-1782) A lexicographer who compiled the 24,500 word Lingua Britannica Reformata (aka A New English Dictionary).
It was published in 1749, at that time becoming the most advanced dictionary of the English language ever made.
It contained two key innovations that became standard:
(1) It made no attempt to "fix" the language, i.e. to try to maintain its purity.
(2) It provided a word's multiple meanings under one heading.
Samuel Johnson adopted both of these innovations in his dictionary, which when published in 1755 superseded Martin's work.