\No"tion\, [L. notio, fr. noscere to know: cf. F. notion.
See {Know}.]
1. Mental apprehension of whatever may be known or imagined;
   an idea; a conception; more properly, a general or
   universal conception, as distinguishable or definable by
   marks or not[ae].
         What hath been generally agreed on, I content myself
         to assume under the notion of principles. --Sir I.
                                               Newton.
         Few agree in their notions about these words.
                                               --Cheyne.
         That notion of hunger, cold, sound, color, thought,
         wish, or fear which is in the mind, is called the
         ``idea'' of hunger, cold, etc.        --I. Watts.
         Notion, again, signifies either the act of
         apprehending, signalizing, that is, the remarking or
         taking note of, the various notes, marks, or
         characters of an object which its qualities afford,
         or the result of that act.            --Sir W.
                                               Hamilton.
2. A sentiment; an opinion.
         The extravagant notion they entertain of themselves.
                                               --Addison.
         A perverse will easily collects together a system of
         notions to justify itself in its obliquity. --J. H.
                                               Newman.
3. Sense; mind. [Obs.] --Shak.
4. An invention; an ingenious device; a knickknack; as,
   Yankee notions. [Colloq.]
5. Inclination; intention; disposition; as, I have a notion
   to do it. [Colloq.]