underaccommodation noun3 •Failure to provide adequate accommodation to the needs of someone. •Insufficient convergence; the situation where a speaker is underaccommodative.Friendships with members of a younger cohort may also be marked by underaccomodation, a linguistic phenomenon in which older adults engage in egocentric topic selection during conversation. — 2003 •The improper adjustment of the eye muscles so that the focal point of a target image falls short of the retina.