Achillean /əˈkɪliən/adjective 6noun 1forms 3 adjective6 •Resembling or relating to Achilles, the hero of the Iliad.Guyon subdues these Achillean affections through his own power; but they break out again as Cymochles lapses into lust and Pyrochles burns in the idle lake. — 1959 •Invincible with only one small weakness (an Achilles heel), which becomes one's downfall. •Guided by emotional motives, especially rage, rather than reason. •Pertaining to the Achilles tendon.Tendon-reflexes, as a rule, remain intact, except the Achillean one, which is frequently either absent or lowered. — 1890 •Of or relating to sexual or romantic intimacy between men, supposedly in the style of Achilles' relationship with Patroclus.Historically, there was indeed an Achillean, homosexual flavor of the declassé bachelorhood out of which Hitler and others formed the advance guard of National Socialism. — 1980 •Of or relating to Achilles Tatius, a Roman-era Greek writer.We are once again reaching a period in our collective cultural history when we may resume the post-Platonic, Achillean conversation. — 2009 noun1 •A fighter on the side of Achilles in the Trojan war; an Achaean. formsAchilleans · more Achillean · most Achillean