1-D
A selective service class denoting that the registrant is already a reserve member of…A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant.
Meaning
1 senses(uncountable)A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable