courteoussmile
nounUK /ˈkɜːtiəs smaɪl/
US /ˈkɝːtiəs smaɪl/
A courteoussmile is a kind smile you give to be polite.
She gave the new student a courteoussmile to make him feel welcome.
OTHER MEANINGS
2. A small smile used to show respect without saying anything.
He offered a courteoussmile as the teacher walked by.
3. A smile that hides your real feelings and keeps things polite.
Even though she was upset, she kept a courteoussmile during the meeting.
4. A quick smile shared between strangers to be nice.
The bus driver gave me a courteoussmile when I got on.