M
Monocle
An eyeglass for one eye
Monolingual
Knowing or able to use only one language
An irrational or disproportionate fear of being alone
Monotone
A single, unchanging tone of voice
Monosyllable
A word of one syllable
Monoxide
A single unchanging tone of voice
Monologue
A form of dramatic entertainment, comedic solo, or the line by a single speaker
Monogamy
Marriage with only one person at a time
Monopoly
The market condition that exists when there is only one seller
Monodrama
A dramatic piece for only one performer