The third gear of an engine.

(transitive) To make thicker (in the sense of wider). / (transitive) To make thicker (in the sense of more viscous). / (intransitive) To become thicker (in the sense of wider).

I believe that is the case, but am not certain.

I think what has been said is untrue. / (sarcastic) No, absolutely not (used to refuse or decline something proposed).

The upper leg of a human, between the hip and the knee.

(euphemistic, idiomatic) To die; to divest oneself of one's mortal body.

(idiomatic) A group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.

A sensation of dryness in the throat associated with a craving for liquids, produced by deprivation of drink, or by some other cause (such as fear, excitement, etc.) which stops the secretion of the pharyngeal mucous membrane.

(intransitive) To be thirsty. / (intransitive, usually followed by "for") To desire vehemently.

(idiomatic) Thinking that is not grounded or in touch with the realities of the present; open-minded thinking.