Definition of "hakama"

In place of his usual garb — baggy cargo pants, T-shirt and sneakers — he was done up in a traditional hakama, his hair pulled back in a neat bun, with his signature round glasses and wispy goatee.

2007 May 7, Carol Vogel, “The Warhol of Japan Pours Ritual Tea in a Zen Moment”, in New York Times‎