1. Plural of dual; things that come in pairs or have two parts or aspects.
Usage: Most commonly used in mathematics and linguistics contexts
2. In grammar, plural forms of the dual number, a grammatical category referring to exactly two people or things (found in some languages like Ancient Greek or Arabic).
Usage: linguistics; formal
3. In mathematics, plural of dual; objects or spaces related to duality in algebraic or geometric contexts.
Usage: mathematics; technical

Examples

• The ancient Greek language used duals to distinguish between two people and more than two.
• In linear algebra, duals refer to dual vector spaces and their properties.
• The artist explored duals in her work, presenting paired images side by side.
• Some languages preserve the dual form for pronouns referring to exactly two individuals.
• The mathematician studied the relationship between primal and dual optimization problems.