to dress (oneself in); to attire oneself in; to adorn; to decorate
to pretend; to feign; to affect; to disguise oneself as
「装う」 has another reading with different meanings.
彼は普段から装う。
He usually dresses up.
彼女は着物を装った。
She dressed herself in a kimono.
その場に合うよう装いました。
I dressed to suit the occasion.