The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis (45 letters), a word that refers to a lung disease …

Sep 2, 2025 · The longest word entered in most standard English dictionaries is Pneumonoultramicroscopicsilicovolcanoconiosis with 45 letters. Our definition is "a lung disease …

Dec 4, 2025 · Top 10 Longest Words in the World: You Won’t Believe #1! Hey guys! Ever wondered what the absolute longest word in the world is? Well, buckle up, because we’re diving deep into the …

May 11, 2025 · Take your vocabulary to the next level with this list, featuring 13 of the longest words in the English language.

Pneumonoultramicroscopicsilicovolcanoconiosis is the longest word entered in the most trusted English dictionaries. The definition is "a lung disease caused by inhalation of very fine silicate or quartz dust."

May 29, 2025 · The longest word in the Oxford English Dictionary is 45 letters: pneumonoultramicroscopicsilicovolcanoconiosis. According to the OED, this synonym for silicosis …

Mar 24, 2025 · Number of Letters: 189,819. Definition: Yep, there’s a word out there that’s almost 190,000 letters long. Technically speaking, it’s not truly a word—it’s actually the chemical name for a …

Oct 29, 2025 · It's important to understand that while pneumonoultramicroscopicsilicovolcanoconiosis is the longest word in many dictionaries, the definition can sometimes vary slightly depending on the …

Aug 19, 2025 · With around 273,000 headwords — for example, if you look up the word “cat” in a dictionary, “cat” is the headword — in the second edition of the Oxford English Dictionary, but only …

Jun 22, 2024 · What's the longest word in English? We have the longest single word and a list of 20 English words with the most letters. Plus, what they mean and how to say them.