Adjective

(er)

Poorly ventilated; partially plugged.

I can't smell very well today – I have a stuffy nose.

Let's go outside – it's getting stuffy in here.

Stout; mettlesome; resolute.

Angry and obstinate; sulky.

Boring, uninteresting, over-formal, pompous, very conventional.

The stuffy professor droned on as the class lost interest.

Adjective

(en adjective)

Boring, monotonous, time consuming, wearisome.

* {{quote-book

, year= , author=Arthur Schopenhauer , title=The Art of Literature , chapter=2 citation , passage=A work is objectively tedious' when it contains the defect in question; that is to say, when its author has no perfectly clear thought or knowledge to communicate. For if a man has any clear thought or knowledge in him, his aim will be to communicate it, and he will direct his energies to this end; so that the ideas he furnishes are everywhere clearly expressed. The result is that he is neither diffuse, nor unmeaning, nor confused, and consequently not ' tedious .}}

* {{quote-book

, year= , author=Arthur Schopenhauer , title=The Art of Literature , chapter=2 citation , passage=The other kind of tediousness is only relative: a reader may find a work dull because he has no interest in the question treated of in it, and this means that his intellect is restricted. The best work may, therefore, be tedious' subjectively, ' tedious .}}