(countable) A pharmacy in which drugs are sold to patients, as opposed to a hospital pharmacy. / (uncountable) The concept of pharmacy as a retailing activity.

Delayed; delayed in development, hindered; impeded. / (psychology, now offensive, dated) Having mental retardation; mentally deficient or underdeveloped.

simple past tense and past participle of retard

Hard to ignite; not supporting or conveying flame.

A substance used to make an object flameproof.

Hard to ignite; not flammable.

A substance that makes an object resistant to burning.

(intransitive) To do something harmful or negative to get revenge for some harm; to fight back or respond in kind to an injury or affront. / (transitive) To repay or requite by an act of the same kind.

(acoustics) The distance by which one wave is behind another. / (music) The act of diminishing the rate of speed. / (telegraphy) A decrease in the speed of telegraph signalling.

Of or pertaining to something that retains something else, as with a retaining wall.