What is the meaning of Co-?

Together: the root word is done co-incidently.

1. Jointly: the root verb is done in coordination between multiple actors or entities

   Jointly: the root verb is done in coordination between multiple actors or entities

   Along with: the root verb is done along with or in addition to others.

   Mutually: the root is done in a way that is reciprocal and bidirectional.

   Simultaneously, done or able to do at the same time.

   Spatially located or positioned together, co-located.

   In conjunction: the root needs another entity to take effect, or there is a one-way interaction between them.

   Moving or oriented in the same direction; co-directional.

   Gender-mixed; having men and women together for the root activity or location.

   Having commonality, similarity with respect to the root.

   Coequal, equal in rank.

   Indicating a family relationship that indicates a common rank made through three degrees of separation, the middle of which is by marriage.

   Equally, equal with respect to the root.

   Homomorphic with respect to the root.

   During the same time period as the root.

   Dual or complement.

   Having multiple targets or effects; the root affects or involves multiple subjects.

   Secondary or auxiliary in rank or priority.

   Referring to coenzymes.

   Referring to copolymers.

   Deriving from multiple sources.

   co- (together; jointly)

   co- (together; jointly)

   co-

   allomorph of con-

   co-

   forms adjectives and adverbs specifying how often something happens: -ly

   co-

   Usually (but not always) designates mutuality or reciprocity.

   co-

   Source: wiktionary.org