Deep in thought and Self-absorbed

Deep in thought adjective - Deeply absorbed in thought.

Self-absorbed and deep in thought are semantically related. In some cases you can use "Self-absorbed" instead an adjective phrase "Deep in thought".

Self-absorbed adjective - Overly concerned with one's own desires, needs, or interests.

Deep in thought and self-absorbed are semantically related. Sometimes you can use "Deep in thought" instead an adjective phrase "Self-absorbed".