(uncountable, mathematics) The branch of mathematics dealing with the properties of graphs (networks of vertices and edges).

in the manner of a theocrat

(politics, religion) The ruler of a theocracy, a priest-king. / (politics, religion) A proponent of theocracy.

(chemistry, physics) a theory, a combination of the earlier crystal field theory with molecular orbital theory, that describes the structure of coordination compounds

an advocate of, or believer in theosophy.

To formulate a theory, especially about some specific subject. / To speculate.

Concerned with theories or hypotheses rather than with practical matters. / Existing only in theory, not proven in reality.

Someone who constructs theories, especially in the arts or sciences.

(philosophy, religion) any doctrine of religious philosophy and mysticism claiming that knowledge of God can be attained through mystical insight and spiritual ecstasy, and that direct communication with the transcendent world is possible.

someone who is expert in the theory of a particular science or art / a theorist