saving-n; 3 Senses

Sense Number 1: a reduction or decrease in the cost of something

Commentary: SAVING[+quantity][+difference][+reduction][+cost]
NOTE: refers to the reduction of costs, not accumulated monetary assets (Sense 3)

This measure will result in a considerable saving of development costs.
The savings of going with the inexpensive vendor are offset by the poorer quality of workmanship.
Mary shops at the discount stores because of the savings on most items. (reduction in cost compared to other places)

WordNet 3.0 Sense Numbers: 1

Sense Number 2: the act of preserving or protecting something

Commentary: SAVING[+event][+action][+preservation][+protection/+rescue/+recovery] The act of recovery, or of keeping something from danger.

The doctor was concerned with the saving of lives.
John's saving of the glass before it shattered on the floor got him a round of applause.
Saving the damsel in distress was the primary goal of Captain Courageous.
"My job is the saving of souls," said the minister.
Their organization is devoted to the saving of the rain forests.

WordNet 3.0 Sense Numbers: 1

Sense Number 3: accumulated money

Commentary: SAVING[+entity][+artifact][+money][+accumulated]
NOTE: refers to accumulated money, not a reduction in the cost of something
NOTE: Always occurs in the plural, 'savings'

John put his savings in a piggy-bank.
John's grandmother bought savings bonds for his future college expenses.
After a year of working, I'd accumulated a few thousand dollars in savings.
The old couple was swindled out of their entire live savings by that real estate scam.
Your savings can earn interest when they're in the bank.
It took billions to bail out the savings and loan bankruptcies of the eighties.

WordNet 0.0 Sense Numbers: 3a