1.
profile; side view of a face
The appearance of a person's face as seen from the side.
2.
another side; different aspect
A less well-known side or aspect of a person, organization, or thing. Used figuratively.
横顔 literally means the side view of a face, in contrast to 正面 (front view). It also has a common figurative use.
SENSE 1 — PROFILE:
Often used in aesthetic or romantic contexts to describe an attractive profile. Common collocations:
SENSE 2 — ANOTHER SIDE:
Figuratively, a lesser-known aspect of a person, organization, or place. Common in journalism and documentary writing: