LDC stands for "Less Developed Country," a term used in economics to describe a country with a low level of economic development. There are many synonyms and alternative terms for LDC, including underdeveloped country, developing country, third-world country, and low-income country. These terms are often used interchangeably, but there are subtle differences in their meanings. While some countries may be described as "underdeveloped" or "low-income," they may not necessarily be considered LDCs by international organizations like the United Nations. Regardless of the terminology used, the goal of international development efforts is to support these countries in their efforts to achieve sustainable economic growth and reduce poverty.