What is the meaning of ?

The hiragana syllable (o). Its equivalent in katakana is (o). It is the fifth syllable in the gojūon order; its position is (a-gyō o-dan, row a, section o).

: yes, alright, okay

: a sign used in some books (clarification of this definition is needed)

: tail, brush, train

, : hill; peak

: fish

, : the hemp or ramie plant; thread or yarn made from fibers derived from the bark of hemp or ramie stems

, , , : man, male

: cord

: small

: honorific prefix to make a word polite

Source: wiktionary.org