precover noun 2verb 1forms 3 noun2 •Something that occurs in preparation for a covering.Zineb did not give good control as a precover spray but as a cover spray it gave excellent control of late and storage scab. — 1957 •A generalization of a cover in which the kernel may contain a non-zero pure subgroup. verb1 •To find an older image of an object in archived images after it has been discovered. formsprecovered · precovering · precovers
