intrabody adjective 2noun 1forms 1 adjective2 •That exists, operates or occurs within a body (especially the human body).An intuitive context aware service between two devices is possible using touch with the intrabody communication. — 2006 •That exists, operates or occurs within the vertebral body. noun1 •An antibody that exists inside and operates within a cell.The T cells could now produce their own anti-Tat intrabody. — 1998 formsintrabodies