1.
stately; dignified; imposing; solid
Having an impressive weight, substance, or dignity. Used to describe architecture, art, writing, music, or a person's demeanor as having depth, seriousness, and gravitas.
重厚な建物だ。
It is an imposing building.
Usage
重厚 conveys a positive sense of substance and dignity. It is used to praise things that have weight, depth, and a commanding presence. It is the opposite of 軽薄 (frivolous, shallow).