full

Full is an adjective and adverb used to describe something that contains as much as possible, is not lacking, or has reached maximum extent. The term signals completeness or totality, as in a full cup, a full day, or full coverage. Its etymology traces to Old English ful and Proto-Germanic *fullaz, with cognates in German voll and Dutch vol.

Common uses include physical fullness (a full cup), capacity (full capacity), and the state after eating (feeling full or satiated). It also appears in measurements and descriptors such as full-time, full-length, full-scale, and full-range, as well as in the adverbial form fully. In abstract senses, it can mean complete or exhaustive, as in a full list, full rights, or a full explanation.

In astronomy, a full moon is the lunar phase when the near side of the Moon is illuminated in its entirety. The term also appears in idiomatic expressions like “in full” or “in full force,” indicating something happening completely or without restraint. Variants include fullness (the state of being full) and fullness-related terms such as satiety in nutrition and fullness in psychology, reflecting the broader notion of completeness across domains.