A large tree of species Acacia koa (family Fabaceae) which is endemic to and common on the islands of Hawaii; or the wood of this tree.

plural of koa

A disease of the koa tree caused by Fusarium oxysporum fungi, which clog the xylem and cause wilting.

A tree-dwelling marsupial, Phascolarctos cinereus, that resembles a small bear with a broad head, large ears and sharp claws, mainly found in eastern Australia.

(colloquial) A koala.

(countable) A surname. / A village and commune of the Saaba department, Kadiogo, Centre, Burkina Faso / A village and commune of the Sourgoubila department, Kourwéogo, Plateau-Central, Burkina Faso

(Zen Buddhism) A story about a Zen master and his student, sometimes like a riddle, other times like a fable, which has become an object of Zen study, and which, when meditated upon, may unlock mechanisms in the Zen student’s mind leading to satori.

plural of koala

plural of koan

Resembling or characteristic of a koan: cryptic, concise, thought-provoking, etc.