(chemistry, physics) Two electrons having opposite spin but all other quantum numbers the same; i.e two electrons in the same atomic orbital or molecular orbital, especially such electrons that function in concert to form a covalent bond

Used paper, to be reused for jotting notes etc.

Alternative spelling of tarpaper

Alternative form of bypath; an unfrequented path; a byway.

(taxation) An individual's level of wealth or income, as a measure of the tax rate they can afford to pay.

(idiomatic) In a secluded location; in or to a place which is not frequently visited or not widely known.

Alternative form of path dependence

(countable) A situation in which the outcome varies with the route taken.

Alternative spelling of notepad

(idiomatic) To meet someone by chance. / (idiomatic) To oppose someone's plans.