Definition of taciturnity:

part of speech: noun

Habitual silence or reserve.

Usage examples:

• Peter's taciturnity from this day on became more marked. Berthold Auerbach in "Landolin".

• As far as the natural shyness and taciturnity of Englishmen would allow him, he was anxious for Mr. Spokesly to do well. William McFee in "Command".

• I remained thus for two days, without seeing anybody but the old woman, who still retained her taciturnity and even when she brought me a scanty allowance of food, did so with a morose and unwilling air. W.H.G. Kingston in "The Prime Minister".

• He told me afterwards that my hugeness and my taciturnity had created exactly the impression he had wished. Oliver Onions in "The Debit Account".