grounding
noun
uk/ˈɡraʊndɪŋ/ us [ S ]
a knowledge of the basic facts about a particular subject:
a grounding in sth His degree gave him a firm grounding in his field.
a basic/solid/firm/good grounding
[ C or U ] TRANSPORT
the act of preventing a ship from sailing or an aircraft from flying:
The grounding of all planes on Tuesday stalled the movement of mail.