Natural killer cells, or NK cells, are a component of the innate immune system which does not directly attack invading microbes. Rather, NK cells destroy compromised host cells, such as tumor cells or virus-infected cells, recognizing such cells by a condition known as missing self..
Definition. Market Value is generally defined as: âThe most probable price which a property should bring in a competitive and open market under all conditions requisite to a fair sale, the buyer and seller, each acting prudently, knowledgeably and assuming the price is not affected by undue stimulus.
Definition of value for English Language Learners. : 1  the amount of money that something is worth : the price or cost of something. : 2  something that can be bought for a low or fair price. : 3  usefulness or importance.