1.
Something that is ~ does not require a lot of money to operate. For example a car that only uses a small amount of petrol is ~.
...plans to trade in their car for something smaller and more ~...
It is more ~ to wash a full load.
ADJ: oft ADJ to-inf, it v-link ADJ to-inf
~ly
Services could be operated more efficiently and ~ly.
ADV: ADV after v
2.
Someone who is ~ spends money sensibly and does not want to waste it on things that are unnecessary. A way of life that is ~ does not need a lot of money.
...ideas for ~ housekeeping.
ADJ
3.
Economical means using the minimum amount of time, effort, or language that is necessary.
His gestures were ~, his words generally mild.
ADJ: usu v-link ADJ