on the side

US /ɑːn ðə saɪd/
UK /ɑːn ðə saɪd/
"on the side" picture
1.

a parte, in aggiunta

in addition to one's main job or activity, often secretly or informally

:
He works as a teacher, but he also does some freelance writing on the side.
Lavora come insegnante, ma fa anche un po' di scrittura freelance a parte.
She sells handmade jewelry on the side to earn extra income.
Vende gioielli fatti a mano a parte per guadagnare un reddito extra.
2.

a parte, separatamente

as a separate or distinct part of something, often referring to a dish served with a main meal

:
I'd like the steak with a salad on the side.
Vorrei la bistecca con un'insalata a parte.
Can I get the sauce on the side?
Posso avere la salsa a parte?