FOOL n.
bells were usually attached, formerly worn by professional jesters. -- Fool's errand, an unreasonable, silly, profitless adventure or undertaking. -- Fool's gold, iron or copper pyrites, resembling gold in color. -- Fool's paradise, a name applied to a limbo (see under Limbo) popularly believed to be the region of v…
INSTINCT n. 2 definitions
Natural inward impulse; unconscious, involuntary, or unreasoning prompting to any mode of action, whether bodily, or mental, without a distinct apprehension of the end or object to be accomplished. An instinct is a propensity prior to experience, and independent of instructions. Paley. An instinct is a blind tendency t…