WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / M / millimeter millimeter noun /mɪləmoʊ/ 4 syllables 10 letters Scrabble 14 WWF 18 Definitions noun a metric unit of length equal to one thousandth of a meter millimetremm Look “millimeter” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →