A more thorough explanation:

K is an abbreviation that can have different meanings depending on the context:

• Contract: K stands for contract.
• Known as: K/A or k/a stands for known as.
• Kaldor-Hicks efficiency: Kaldor-Hicks efficiency is a concept in economics that aims to maximize overall wealth.
• Kangaroo court: Kangaroo court is a term used to describe a mock court that does not follow legal procedures and often has a predetermined outcome.
• King's Bench: K.B. stands for King's Bench, which was a court of common law in England.
• King's Counsel: K.C. stands for King's Counsel, which is a title given to barristers in some Commonwealth countries.
• Knocked down: In a bill of lading, k.d. stands for knocked down, which means that goods or equipment are shipped in disassembled form.

Here are some examples of how K can be used:

• When signing a contract, you might see the abbreviation K instead of the word contract.
• If someone changes their name, they might use K/A or k/a to indicate their previous name.
• The Kaldor-Hicks efficiency principle suggests that an action is beneficial if the winners could compensate the losers and still be better off.
• A kangaroo court might be set up by a group of people who want to punish someone without going through the legal system.
• The King's Bench was one of the highest courts in England until it was abolished in 1875.
• A barrister who is appointed as King's Counsel can use the title K.C. after their name.
• If you order furniture that needs to be assembled, the bill of lading might indicate that it is k.d. to let the recipient know that they need to put it together themselves.

These examples illustrate how K can have different meanings depending on the context in which it is used.