There are 2 definitions of ng in English:

ng1

Syllabification: ng

abbreviation

Nanogram(s).

Definition of ng in:

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Word of the day apposite
Pronunciation: ˈapəzɪt
adjective
apt in the circumstances or relation to something

There are 2 definitions of ng in English:

NG2

Syllabification: NG

abbreviation

1National Guard.
1.1Natural gas.
1.2Newsgroup.
1.3No good.
1.4 Football Nose guard.