Meaning

• The state or process of simmering.

  "The kettle was kept on the simmer."

Meaning

• To cook or undergo heating slowly at or below the boiling point.

  "The soup simmered on the stove."

• To cause to cook or to cause to undergo heating slowly at or below the boiling point.

  "Simmer the soup for five minutes, then serve."

• To be on the point of breaking out into anger; to be agitated.

• To remain angry with someone or something past the point of exhaustion; to resign oneself to holding a grudge, especially after some failed attempts to resolve a situation.

  "I tried to get through to him; all that's left for me to do is simmer."