1. using the minimum of time or resources necessary for effectiveness

- an economic use of home heating oil

- a modern economical heating system

- an economical use of her time

Similar word(s): efficient, economic

2. of or relating to an economy, the system of production and management of material wealth

- economic growth

- aspects of social, political, and economical life

Similar word(s): economic

3. avoiding waste

- an economical meal

- an economical shopper

Similar word(s): thrifty, frugal, scotch, sparing, stinting