https://latin-dict.github.io/dictionaries.html
Fast introduction into the Latin-Latin dictionaries:
concise: Laurenzi
middle-sized: Reyher, Gallicciolli
extensive: Forcellini, Gesner, TLL
These and other monolingual dictionaries:
Appleton, 1914: Index verbōrum
[Latin]
Gallicciolli, 1778: Calepinus septem linguarum
[Latin, Italian, Hebrew, German, French, Spanish, Ancient Greek] page index
(Anonymous), 2020: Lexicon Latīnum Tumblrense
[Latin]
Laurenzi, 1708: Amalthea Onomastica
[Latin, Italian] page index
Popma, 1865: De differentiis verborum
[Latin]
Reyher, 1712: Theatrum Latino-Germanico-Graecum
[Latin, German, Ancient Greek]
Wikimedia Foundation, 2020: Victionarium Latinum
[Latin]
Baret, 1574: An Alveary or Triple Dictionary
[English, Latin, French]
Del Col, 2007: Diccionario auxiliar Español-Latín
[Spanish, Latin]
Georges, 1910: Kleines deutsch-lateinisches Handwörterbuch
[German, Latin]
Kazojć, 2010: Otwarty słownik łacińsko-polski
[Latin, Polish]
Lewis, 1890: An Elementary Latin Dictionary
[Latin, English]
López Pozo, 1997: Diccionario Español-Griego-Latín
[Spanish, Ancient Greek, Latin]
Poliachev, 2002: Большой русско-латинский словарь
[Russian, Latin]
Redmond, 2005: Glossarium Anglico-Latinum
[English, Latin]
Simpson, 1959: Cassell’s Latin Dictionary
[Latin, English]
Smith & Hall, 1871: A Copious and Critical English-Latin Dictionary
[English, Latin] draft
Žepić, 1941: Rječnik latinskoga i hrvatskoga jezika
[Latin, Croatian]
Döderlein, 1875: Hand-book of Latin Synonymes
[Latin, English]
Dumesnil, 1819: Latin synonyms
[Latin, English]
John Hill, 1804: The synonymes of the Latin language
[Latin, English]
Popma, 1865: De differentiis verborum
[Latin]
Ramshorn, 1860: Dictionary of Latin synonymes
[Latin, English]
Shumway, 1898: A Hand-Book of Latin Synonymes
[English, Latin]
Skřivan, 1890: Latinská synonymika pro školu i dům
[Latin, Czech]
Spinelli & Fenzi, 2019: Latin near-synonyms
[Latin]
Wagner, 1878: Lexicon Latinum
[Latin, French] draft
Elliott, 1998: Abbreviations in Latin Inscriptions
[Latin]
Gesner, 1749: Novus linguae et eruditionis Romanae thesaurus
[Latin] page index
Lewis & Short, 1879: A Latin Dictionary
[Latin, English]
Nolte, 1744: Lexicon Latinae Linguae Antibarbarum
[Latin]
Smith, 1854: Dictionary of Greek and Roman Geography
[Latin, Ancient Greek, English] encyclopaedia
Smith, 1873: A Dictionary of Greek and Roman biography and mythology
[Latin, Ancient Greek, English] encyclopaedia
Smith, 1890: A Dictionary of Greek and Roman Antiquities
[Latin, Ancient Greek, English] encyclopaedia
TLL, 1900-present: Thesaurus linguae Latinae
[Latin]
Bailly, 2020: Dictionnaire grec-français
[Ancient Greek, French]
Comenius, 2014: Janua linguarum reserata
[Ancient Greek, Latin]
Estienne, 1831-1865: Thesaurus Graecae linguae
[Ancient Greek, Latin] page index
Frisk, 1960-1972: Griechisches Etymologisches Wörterbuch
[Ancient Greek, German]
Hederich, 1825: Novum lexicon manuale Graeco-Latinum et Latino-Graecum
[Ancient Greek, Latin] page index
Liddell & Scott, 1940: A Greek-English Lexicon
[Ancient Greek, English]
Verkerk, 2020: Morphologia Graeca
[Ancient Greek]
Schrevel, 1831: Lexicon manuale graeco-latinum et latino-graecum
[Ancient Greek, Latin] page index