noun, noun which may take the genitive case particle 'no'
right opposite; directly across; face to face
Describes a position or direction directly facing something, often across a street, table, or open space. Can be used as a noun or with の to modify another noun.
See also: 真向かい
銀行は駅の真向こうにあります。
The bank is right opposite the station.
彼は私の真向こうに座った。
He sat directly across from me.
真向かい is more common and neutral for 'directly opposite'; 真向こう is a less frequent variant with the same meaning.
Compound of 真 (ま, 'true, just') and 向こう (むこう, 'opposite side, beyond').