What does Khmer mean?

Factual Questions
1

As in the “Khmer Rouge.” I know that “rouge” is French for Red, but what does Khmer translate to in English?

2

Opens the dictionary

From Random House
Khmer (kmâr, kuh mâr’)

n. pl. <Khmers> (esp. collectively)
Khmer>

  1. a member of a people who constitute the majority of the inhabitants of Cambodia and live also in parts of SE Thailand and the Mekong delta of Vietnam.

  2. the Mon-Khmer language of the Khmers: the official language of Cambodia.

  3. CAMBODIAN (def. 2).