Alemanni adjective 2noun 2 adjective2 •Of or related to the Alemanni peoples.This time, however, his troops faced the full brunt of an Alemanni force that attacked them on the way. — 2007 •Of or related to the Alemannic language or dialects. noun[plural only]2 •A group of Germanic peoples living between the Rhine, Main, and Danube Rivers from the third to the sixth century.The Alemanni were originally composed of fragments of several Germanic peoples, and they remained a loosely knit confederation of tribes in the Suebi group (see Suebi). — 2011 •Those individuals descended from one of the Alemanni tribes.On the basis of their location along the Rhine River during the sixteenth and seventeenth centuries, I have concluded that my ancestors were Alemanni and Franks, though lacking in ethnic purity. — 2011