Longman Dictionary of Contemporary English
Wiktionary
a. Of, pertaining to, or changing over generations.
WordNet
adj. of or relating to a generation
Usage examples of "generational".
When young householders took their growing wealth and tax base with them from the cities to the suburbs, they created a economic, generational, and cultural division between them and the cities.
Even generational contemporaries, who sympathized with much CHEAP TRUTH rhetoric, came to distrust the cult itself -- simply because the Cyberpunks had become "genre gurus" themselves.
A Nike-Hercules, rising up into the Aurora Borealis, sent by a two-year-old to challenge its generational successor.
The generational clock ground out another revolution, and time turned friends to strangers.
In the early 1960s the Skunk Works built an aircraft that was a generational leap ahead of anything else in the air.
Or was she intentionally trying to stir up a generational conflict?