defend. Keep, signifying generally to have and retain in possession, is the terse, strong Saxon term for many acts which are more exactly discriminated by other words.
Wiktionary(0.00 / 0 votes)Rate this definition: heading(Noun) The title or topic of a document, article, chapter etc. heading(Noun) The direction into which a seagoing or airborne vessel's bow is pointing (apparent heading) and/or the direction into which it is actually moving relative to the ground (true heading)
what does map term to subject heading mean? In databases with a controlled vocabulary or thesaurus (like MEDLINE's MeSH-- Medical Subject Headings) -- a checkbox labeled Map Term to Subject Heading appears above the Command Line on the Main Search Page.