SIGNIFICANT

adj. 1 important, weighty, momentous, consequential, critical, substantial, substantive, noteworthy, notable, valuable, valued, meritorious, outstanding, impressive, historic, relevant, signal Appleton made significant contributions to knowledge about the ionosphere 2 meaningful, eloquent, pithy, expressive, pregnant, suggestive, informative It is significant that they prefer the term Britain to England, Scotland, and Wales