(Britain, plural: stone) A unit of mass equal to 14 pounds. Used to measure the weights of people, animals, cheese, wool, etc. 1 stone ≈ 6.3503 kilograms
(botany) The central part of some fruits, particularly drupes; consisting of the seed and a hard endocarp layer.
(dated, printing) A stand or table with a smooth, flat top of stone, commonly marble, on which to arrange the pages of a book, newspaper, etc. before printing; also called imposing stone.
Verb
(transitive) To pelt with stones, especially to kill by pelting with stones.
(transitive) To remove a stone from (fruit etc.).
(intransitive) To form a stone during growth, with reference to fruit etc.
(transitive, slang) To intoxicate, especially with narcotics. (Usually in passive)
(intransitive, Singapore, slang) To do nothing, to stare blankly into space and not pay attention when relaxing or when bored.