Having a smooth surface in general: as, a smooth-faced file.
Having a smooth face; beardless.
Having a mild, bland, or winning look; having a fawning, insinuating, or hypocritical expression.
The Century Dictionary (Public Domain)
Use "smooth-faced" in a sentence
"He was a smooth-faced, blue-eyed youngster of twenty-five, slender and natty in his captain's uniform."
"In appearance and atmosphere he was a strapping big college man, smooth-faced and easy-mannered, clean and simple and wholesome, with a known record of being a splendid athlete and an implied vast possession of cold culture of the inhibited sort."
"A smooth-faced, moon-faced young man was smiling at her good-naturedly."