The phrase "in retirement" refers to the stage of life when one has stopped working and is now living off of their savings, investments, or pension. It can also denote a period of rest or leisure after a long career. There are various synonyms that can be used to describe this phase of life, such as "retired," "senior," "elderly," "aged," "golden years," "post-career," "inactive," "unemployed," "leisurely," "non-working," and "idled." These words are often used interchangeably and can evoke different connotations depending on the context in which they are used. Ultimately, they all describe this important phase of life when individuals can enjoy the fruits of their labor and pursue their interests in a more relaxed way.