A model is an informative representation of an object, person or system. The term originally denoted the plans of a building in late 16th-century English, and derived via French and Italian ultimately from Latin modulus, a measure. 展开

A physical model (most commonly referred to simply as a model but in this context distinguished from a conceptual model) is a smaller or larger physical representation of an object, person or system. The object being modelled may be small (e.g., an atom) or … 展开

According to Herbert Stachowiak, a model is characterized by at least three properties:
1. Mapping A model always is a model of something—it is an image … 展开

• Media related to Physical models at Wikimedia Commons 展开

As a noun, model has specific meanings in certain fields, derived from its original meaning of "structural design or layout":
• Model (art), a person posing for an artist, e.g. a 15th-century criminal representing the biblical Judas in Leonardo da Vinci's painting 展开

A conceptual model is a theoretical representation of a system, e.g. a set of mathematical equations attempting to describe the workings of the atmosphere for the purpose of weather … 展开

• Conceptual framework
• Metamodeling
• Model aircraft
• Model car
• Model house
• Model railway 展开