Both Uses of
glower
in
Lord of the Flies
- Jack glowered.†
p. 118.0glowered = stared angrily
 
- He glowered up under his eyebrows.†
p. 127.0 *
 
Definitions:
- 
(1)
(glower) to stare angrily
 - 
(2)
(meaning too rare to warrant focus) meaning too rare to warrant focus:
Less commonly, glower can refer to a dim glow or emission of light.