A convention is a set of agreed, stipulated or generally accepted social norms, norms, standards or criteria, often taking the form of a custom.
Certain types of rules or customs may become law, and regulatory legislation may be introduced to formalise or enforce the convention (e.g. laws which determine which side of the road vehicles must be driven). In a social context, a convention may retain the character of an "unwritten" law of custom (e.g. the manner in which people greet each other, such as by shaking each other's hands).
In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in a convention, for example an average of many measurements, agreed between the scientists working with these values.
The nature of conventions has raised long-lasting philosophical discussion. Quine, Davidson and David Lewis published influential writings on the subject. Lewis's account of convention received an extended critique in Margaret Gilbert's On Social Facts. Another view of convention comes from Ruth Millikan's Language: A Biological Model (2005), once more against Lewis.
There are generic conventions which are very closely tied to a particular artistic genre, and may even help to define what that genre is. Terms such as fan conventions and science fiction conventions could be interpreted in this manner, but more often refer to the meaning of "convention" as a gathering or the physical location of a gathering.
The term convention is also used in international law to refer to certain formal statements of principle such as the Convention on the Rights of the Child. Conventions are adopted by international bodies such as the International Labour Organization and the United Nations. Conventions so adopted usually apply only to countries that ratify them, and do not automatically apply to member states of such bodies. These conventions are generally seen as having the force of international treaties for the ratifying countries. The best known of these are perhaps the several Geneva Conventions.
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"Convention (norm)".
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