réferer

Référer is a French verb meaning to refer, to direct someone or something to a person, source, or authority for information, aid, or evaluation. It is used when directing someone to a specialist, citing a source, or entrusting a matter to another entity. The verb can express indicating a source, or turning a matter over to another authority. It is etymologically derived from Latin referre, “to bring back, report.” It is a regular -er verb and is conjugated accordingly; for example, present tense forms include je réfère, tu réfères, il réfère, nous référons, vous référez, ils réfèrent. Common constructions are se référer à (to refer to) and référer quelqu’un à quelqu’un d’autre (to refer someone to someone else).

In computing, Referer (the standard spelling in many contexts) is the name of an HTTP header that carries the URL of the page that linked to the current request. The header can be used for analytics, logging, and some security decisions. However, it can reveal sensitive information such as internal URLs or query parameters, raising privacy concerns. To mitigate this, web developers can apply the Referrer-Policy mechanism to control how much of the referring URL is sent, or suppress it in cross-origin requests.