in a way that shows careful use of money or resources (= fuel, water, or other useful things):
He called on the country to live thriftily and find ways to make our society more efficient.
There are many ways of using energy thriftily.
in a way that shows careful use of money or resources (= fuel, water, or other useful things):
He called on the country to live thriftily and find ways to make our society more efficient.
There are many ways of using energy thriftily.