What is the meaning of the word "waffle"?

Definitions:

A type of food made from batter or dough cooked between two plates that are patterned to give a characteristic size, shape, and surface impression. NOUN
- For breakfast we had delicious waffles topped with fresh berries and maple syrup.
Refers to a grid-like structural pattern, often used in engineering and architectural design. NOUN
- The building featured a waffle slab design to enhance strength and reduce weight.
To be unable to make a decision or to change one's mind frequently. VERB
- He tends to waffle when asked about his future plans, unable to settle on a clear direction.
To speak or write in a way that is unclear or lacks substance, often to avoid giving a direct answer. VERB
- The politician was criticized for waffling during the debate, failing to provide concrete answers to important questions.
To talk or write at length in a trivial or ineffective way. NOUN
- The professor waffled on about the topic for an hour, but the students found it hard to follow.