A philosopher, a person who writes or reasons in philosophy.
A person who creates superficial arguments or offers meaningless solutions, instead of practical ones.
A learned person in India; someone with knowledge of Sanskrit, philosophy, religion and law; a Hindu scholar.
A native surveyor in British India, trained to carry out clandestine surveillance beyond British borders.
An expert in a particular field, especially as called upon to provide comment or opinion in the media; a commentator, a critic.