Felix Mendelssohn fe·lix·men·delssohn uncommon noun 1. German musician and Romantic composer of orchestral and choral works (1809-1847) SynonymsMendelssohnFelix MendelssohnJakob Ludwig Felix Mendelssohn-Bartholdy Related words Broader terms composer WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.