sustainsus·tain /səˈsteɪn/ verb [transitiveT]1if a company sustains losses or other difficulties, it has themLike other insurance companies, we havesustained heavylosses.
The record industrysustained a salesslump in the first half.
2to manage to make something continue to exist over a long period of timeThe Dow Jones broke above the 2935 level in the early afternoon but was unable to sustain the gains.
Officials predict the electronics industry will be able tosustain growth.
We’re seeing a healthy fall in inflation, but the question is whether it can be sustained.
—sustained adjectiveadja period ofsustained economic growth