multiflag

Multiflag is a term used across several domains to describe the simultaneous use or representation of multiple flags or flag indicators. In vexillology, the study of flags, multiflag denotes displays that incorporate more than one flag to convey layered symbolism or official status. Displays may combine a national flag with a state, municipal, or organizational flag, or place several national flags together to signify a union, partnership, or commemorative event. Etiquette and legal considerations govern arrangements, hoisting order, and proportions, which vary by jurisdiction and institution.

In computing and digital signaling, multiflag refers to a collection of boolean flags packed into a single value, often as a bit field. Each flag corresponds to a bit, and the overall state is tested using bitwise operations. This approach permits compact storage and efficient checks, such as setting, clearing, or toggling individual flags. Real-world uses include feature toggles, permission sets, or status registers in hardware and software systems.

In maritime and civilian signaling, multiflag can describe the practice of flying more than one signal or house flag to convey complex information. Signal flags are designed to be legible at distance, and the combination rules are governed by established signaling codes. The term may also appear in historical documentation describing fleets, alliances, or ceremonial flotillas.

The term multiflag is not tied to a single, universal standard and its precise meaning depends on context. It is sometimes treated as a descriptive umbrella for multiple-flag practices rather than a formal technical term.

See also: flag, vexillology, bit flag, flag signaling.