A creature is Humanoid if it has a roughly upright or semi-upright, bilaterally symmetric body plan; possesses manipulative appendages capable of wielding tools and weapons; and demonstrates social intelligence sufficient for language and stable societies.
Examples: Humans, elves, orcs, goblins, centaurs, insectoid peoples, lizardfolk, goat-folk, etc.
Borderline Cases
Mixed forms like centaurs qualify if the upper body can fight, craft, signal, or otherwise operate tools. Alien anatomies qualify if they can reliably grip or control tools through claws, tendrils, palps, or telekinetic focus. Constructs or undead qualify only if they possess their own language and culture rather than acting as mindless extensions of another will. Shapeshifters count only while in a qualifying form. Animals that use simple tools are not Humanoid unless they have true language and organized societies.
Rules Effects
Humanoids can use standard gear that fits their frame. Unusual bodies may require custom sizing at the DN's discretion. Communication: Humanoids can speak or sign languages. Pure telepathy qualifies if it supports complex language. Targeting: Abilities affecting "humanoids" apply to any creature currently meeting this definition.
DN Guidance
Decide on culture and tool-use first, then anatomy. If the answers are yes to language, yes to reliable tool use, and yes to organized society, treat the creature as Humanoid.