multisession verb 2adjective 1forms 3 verb2 •To record data to an optical disc over more than one session, instead of having to finalize it after the first session. •To operate multiple simultaneous sessions, for example allowing many users to be active at one time. adjective1 •Involving multiple sessions.Allow additional burns enables you to create a multisession CD, which can be used again to write more data. — 2003 formsmultisessioned · multisessioning · multisessions