Ho

pron.	1.	Who.
n.	1.	A stop; a halt; a moderation of pace. There is no ho with them. - Decker.
prop. n.	1.	(Chem.) The chemical symbol for Holmium.
interj.	1.	Halloo! attend! - a call to excite attention, or to give notice of approach.
	2.	Stop! stand still! hold! - a word now used by teamsters, but formerly to order the cessation of anything. The duke . . . pulled out his sword and cried "Hoo!" - Chaucer. An herald on a scaffold made an hoo. - Chaucer.

Noun

1.

Ho - a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds Synonyms: atomic number 67, holmium

atomic number 67, gadolinite, holmium, metal, metallic element, ytterbite