coming after, less important than, or resulting from someone or something else that is primary

the plot is of secondary importance: what matters most is the relationships between the characters

luck plays a role, but it's ultimately secondary to local knowledge

(of an organic compound) having its functional group located on a carbon atom which is bonded to two other carbon atoms

denoting or relating to organisms in a particular community that belong to the second trophic level among its consumers, and consume primary consumers

when a bear eats a plant-eating rodent, the bear is functioning as a secondary consumer

relating to or denoting the output side of a device using electromagnetic induction, especially in a transformer

the primary and secondary coils of the transformer

a secondary school

a secondary coil or winding in an electrical transformer

a secondary feather

the Secondary or Mesozoic era