To put or fix before, or at the beginning of, another thing; as, to prefix a syllable to a word, or a condition to an agreement.

That which is prefixed; esp., one or more letters or syllables combined or united with the beginning of a word to modify its signification; as, pre- in prefix, con- in conjure.

an affix attached before a base word or root, as re- in reprint. See also affix. Cp. suffix.

A substring at the beginning of a given string.

The leading digits of a telephone number.

If you dial either one or a few digits before a phone number -- a prefix -- you can relay certain things to the phone company, such as needing assistance, etc.

a number that subscribers must enter to send a fax to a fax endpoint

Several contexts, for example in phone numbers, 00, to indicate that the following digits are an international phone number. መበገስ View

The first part of a pathname the name of the disk and, if you like, the name of a subdirectory. Applications that ask you to type a pathname usually let you set a prefix so you don't have to type the complete pathname every time you want to work with a document on a particular disk or in a particular subdirectory. Once the prefix is set, all you do is type the rest of the pathname.

A prefix is used as the first part of certain kinds of name. A prefix is either a function call or a name.

A Host record field. An optional string which follows the Host name in a Midgard targeted URL. It may be seen as a prefix to the requested Page or as a suffix to the Host name. Different prefixes enable separate virtual Hosts with the same Host name and port number.

Item name prefixes can be used for two purposes. Grouping items for validation. Having more than one item on the screen with the same display name.

The network-specific portion of a CIDR address. The prefix identifies the network routing information, such as the network address or subnet information.

an IP address and network mask

a set of network addresses that a given route covers