Other
- a prefix meaning Portuguese (after the Roman province of Lusitania, roughly corresponding to modern Portugal).
- Historical, legal, geographical, and political writing to refer to those countries that have a significant Portuguese influence in language and Portuguese cultural heritage.
- a person of Portuguese heritage, origin, or ethnicity.
- Águas do Luso, one of the largest Portuguese companies of mineral water.
- the protagonist and main character in Final Fantasy Tactics A2: Grimoire of the Rift.
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