Have a session is an expression that means to have a meeting or gathering. It can be used in a variety of contexts, such as business meetings, social gatherings, or even therapy sessions. The two crossword solutions for this term are MEET (4 letters) and SIT (3 letters). MEET is an action verb that means to come together with someone or a group of people. SIT is also an action verb that means to take a seat or to be in a seated position. Together, these two words form the phrase 'have a session, ' which is a way of saying that a group of people are coming together to discuss something or to spend time together.