The katakana syllable ロ (ro). Its equivalent in hiragana is ろ (ro). It is the forty-third syllable in the gojūon order; its position is ラ行オ段 (ra-gyō o-dan, “row ra, section o”).

short form for Russia or Russian, Russo- (prefix), short form of ロシア (Roshia), also written in kanji: 露 (ろ, Ro).

si (musical note)

(very rare) Short for 白ロシア (“Belarus (a country)”).

(music) B major

Rhodes (in Greece)

(music) A minor

Lojban (an artificial language)

(transitive, informal) to lose

(nonstandard, linguistics) The katakana syllable ロ゚ (lo). Its equivalent in hiragana is ろ゚ (lo)