Refers to the act of going out, especially for social or formal occasions, as opposed to staying home.
I have no plans to go out today, so I'll relax at home.
one's best clothes; Sunday best
Clothes worn for going out, especially for formal or special occasions; often used in the phrase よそ行きの服.
祖母はよそ行きの着物を大切にしまっている。
My grandmother carefully stores her best kimono for going out.
noun which may take the genitive case particle 'no'
Used as a no-adjective to describe language, manners, or behavior that is more formal or polite than usual, as when one is in public or with guests.
お客さんの前では、子供たちもよそ行きの言葉づかいになる。
In front of guests, even the children use formal language.
彼はよそ行きの顔でにこやかに挨拶した。
He greeted them with a polite, company smile.
My mother went out wearing her best clothes.
He put on a polite, formal face in front of the guest.
She used formal, polite language in front of the teacher.
I changed into my going-out clothes before departure.
丁寧 describes polite speech or manners in general, while よそ行き specifically implies a stiffer, put-on formality used in front of others.
Kana spelling; common in casual writing or when avoiding kanji.
Alternate kanji spelling using 余所; less common but still encountered.
Rarely used kanji form; 他所 is an uncommon spelling for よそ.