Describes the darkest possible color, resulting from the total absence or complete absorption of visible light. It is frequently used to describe physical appearance, somber moods, or specific technical concepts in science and finance.
A system of words, letters, figures, or other symbols used to represent others, especially for the purposes of secrecy or computer programming. It also refers to a set of rules or principles that a group of people agree to follow.
A word used before a singular noun that is not specific or is being mentioned for the first time. It is used only before words that begin with a consonant sound to indicate one of something.
A person whose job is to receive and pay out money in a shop, bank, or restaurant. They usually work at a checkout or a counter to handle customer transactions and provide receipts.
