(typography) the ban on separating multiple successive instances of certain leading punctuation marks, such as multiple successive em dashes, wavy dashes, two-dot leaders, ellipses, etc., during line breaking

prohibition of sale, including suppression of a publication by prohibiting its sale

All rights reserved, reproduction prohibited.

chain reaction (series of events) / chain reaction (type of nuclear reaction)

(probability theory) Markov chain

(ecology) a food chain

Kyūjitai form of 発売禁止: prohibition of sale

curfew

(business) multi-level marketing

(genetics) linkage disequilibrium