street clothes; townwear
Clothing worn when going out in town, as opposed to home wear or formal attire.
On my day off, I go out in street clothes.
外出着 is a more general term for clothes worn when going out, while 街着 has a nuance of stylish or presentable townwear.
Standard kanji spelling.
Rarely used kanji form; 街着 is preferred.
Compound of 街 (まち, 'town') and 着 (ぎ, 'clothing').