Contorno vs. profilo
Both contorno and profilo translate to "outline" or "contour" in English, but they represent different visual and figurative concepts. The word contorno generally focuses on the outer boundary, perimeter, or the surrounding context of a shape or event. The word profilo is typically used for a silhouette, a side view of a face or landscape, or an analytical description of a person or situation.
Contorno
The word contorno refers to the literal line that marks the outer limits of a figure, object, or drawing, much like a perimeter. In a figurative sense, contorno is used to describe the surrounding circumstances, details, or general context of a specific event.
Il bambino ha colorato la figura senza uscire dal contorno.
(The child colored the figure without going outside the outline.)
Le nuvole nascondevano il contorno della luna.
(The clouds were hiding the contour of the moon.)
Devi tagliare la stoffa seguendo il contorno del modello.
(You must cut the fabric following the outline of the pattern.)
Il contorno di questa vicenda politica è ancora poco chiaro.
(The context of this political event is still unclear.)
Ho evidenziato il contorno della mappa con un pennarello rosso.
(I highlighted the border of the map with a red marker.)
Profilo
The word profilo refers to the outline of a three-dimensional object seen against a background, such as a mountain skyline or the side view of a human face. Figuratively, profilo is used to discuss a specific analytical standpoint, a summary of characteristics, or a professional and psychological description.
Il profilo delle montagne si stagliava contro il cielo al tramonto.
(The outline of the mountains stood out against the sky at sunset.)
La moneta antica mostrava il profilo dell'imperatore.
(The ancient coin showed the profile of the emperor.)
Dal traghetto abbiamo ammirato il bellissimo profilo della città.
(From the ferry we admired the beautiful skyline of the city.)
Dobbiamo valutare il progetto sotto il profilo economico.
(We need to evaluate the project from an economic standpoint.)
La polizia ha tracciato il profilo del ladro in base agli indizi.
(The police drew up the profile of the thief based on the clues.)
Summary
To summarize, use contorno when referring to a drawn perimeter, the outer edge of a two-dimensional shape, or the surrounding background details of a situation. Use profilo when describing a side view, a silhouette against a background, or an analytical summary and viewpoint.