plural of I / Abbreviation of Islands. (also Is.)

A lack of knowledge results in happiness; it is more comfortable to not know certain things.

(law) A dispute over a material fact upon which the outcome of a legal case may rely, and which therefore must be decided by a judge or jury; a dispute which precludes summary judgment.

(obsolete) Contraction of is it.

To disagree with something, and to raise objections to it

Lessons learned from experience are the most lasting.

(physics) An excited state of an isotope, often having different a spin quantum number (designated with an m)

An isotopic signature

Our models of the world, and our sensations of the world, are not the true world.

(UK, road transport) An area of road surface marked with cross hatching as a means of separating traffic or reducing speed, or to provide a safe area to turn right across approaching traffic.