adjective

1. second, or below the first, in rank, importance, class, place, etc.; subordinate; minor; not primary
2. 1. derived or resulting from something considered primary or original; dependent; derivative
   2. secondhand; not original a secondary source of information
   3. designating colors derived by mixing two primary colors
3. coming after that which is first in a series of processes, events, stages, etc., as of growth or development
4. coming next in sequence after the primary or elementary level secondary education
5. Chem.
   1. formed by the replacement of two atoms or radicals in the molecule secondary sodium phosphate, NaHPO
   2. characterized by or designating a carbon atom that is directly attached to two other carbon atoms in a closed or open chain
6. Elec. designating or of an induced current or its circuit in a transformer, induction coil, etc.
7. Geol. formed as a result of the alteration, disintegration, or erosion of preexisting rocks or minerals
8. Linguis.
   1. derived from a base that is itself a word, by the addition of a prefix or derivational suffix
   2. designating a form or a process that is historically relatively late; not original
9. Zool. designating or of the long flight feathers attached to the second joint or segment of a bird's wing

Etymology: ME secundary < L secundarius

noun pl. secondaries -·ar′·ies

1. a person or thing that is secondary, subordinate, or inferior
2. any of the secondary colors
3. Elec. an output winding of a transformer from which the power is taken
4. Football the defensive backfield
5. Zool. a secondary feather