It means- A building
Un immeuble
An appartment complex is 'un immeuble' (masc.) in French.
'un appartement' (masc.) an apartment block, a block of flats: un immeuble
Un immeuble (talking about the building) Une copropriété (talking about the legal entity)
immeuble
A story or storey in a building is called "un étage" (masc.) in French. Cet immeuble a dix étages: that building has ten stories.
Meuble and immeuble have the same origin. Meuble comes from Latin "mobilis", meaning which can be moved (compare 'mobile'); immeuble comes from the same root, through the word "immobilis", meaning 'which cannot be moved'.
un sac is a bag in French.
un four is an oven in French
"un bus" is a bus in French.
un survêtement is a tracksuit in French.
un crâne is a skull in French.