UNDULANT Definition Meaning - Merriam-Webster The meaning of UNDULANT is rising and falling in waves How to use undulant in a sentence When Should You Use undulant? rising and falling in waves; having a wavy form, outline, or surface… See the full definition Games; Word of the Day; Grammar; Wordplay; Slang; Rhymes; Word Finder; Thesaurus; Join MWU; More Games; Word of the Day