ww

ww is an abbreviation that appears in multiple domains and carries different meanings depending on context. There is no universal definition for the string itself; capitalization and field determine its interpretation.

In historical writing, WW may be used as a shorthand for a World War in informal notes. In formal historiography, the standard forms are WWI for World War I and WWII for World War II, and a standalone "WW" is uncommon.

In contemporary branding, WW is the official name of a wellness company that originated as Weight Watchers. Since a rebranding in the 2010s, the company uses WW as its brand, with a focus on wellness services, digital tools, and communities. The slogan Wellness that Works is associated with its messaging. The organization markets weight-management programs and related products under the WW brand.

In genetics, WW denotes a homozygous dominant genotype for a gene symbolized by W; Ww is heterozygous, and ww is homozygous recessive. The phenotype depends on the gene’s dominance relationships.

Other uses are context-specific and may include internal codes or product identifiers. When encountering "ww," readers should rely on surrounding text to determine meaning, and in reference to the World Wide Web the standard acronym is WWW, not WW.