Use 'owlish' to suggest someone's thoughtful and intelligent appearance, not actual wisdom. With his thick beard and owlish demeanor, the professor commanded respect.
Pro Tip 2/3
Serious Aspect
Conveys a serious, possibly stern face, like an owl's unchanging expression. During the meeting, her owlish expression made everyone stay focused.
Pro Tip 3/3
Appearance Cue
Often refers to someone's physical appearance, especially large glasses that resemble owl's eyes. His owlish spectacles added to the scholarly air of the library.