What is the meaning of ま?

The hiragana syllable ま (ma). Its equivalent in katakana is マ (ma). It is the thirty-first syllable in the gojūon order; its position is ま行あ段 (ma-gyō a-dan, “row ma, section a”).

間: space; room

目, 眼: prefixal bound form of め (me, “eye”)

真: the truth, reality, genuineness

真: real, genuine

真: pure, unadulterated

真: definitely, certainly, exactly, precisely, directly

真: true, real, main

真: great, excellent

Source: wiktionary.org