remarkable

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Attracting or worthy of notice, especially for being unusual or extraordinary.

from The Century Dictionary.

• Observable; worthy of notice.
• Extraordinary; unusual; deserving of particular notice; such as may excite admiration or wonder; conspicuous; distinguished.
• Synonyms Noticeable, notable, rare, strange, wonderful, uncommon, singular, striking.
• noun Something noticeable, extraordinary, or exceptional; a noteworthy thing or circumstance.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Worthy of being remarked or noticed; noticeable; conspicuous; hence, uncommon; extraordinary.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Worthy of being remarked or noticed; noticeable; conspicuous; hence, uncommon; extraordinary.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective unusual or striking
• adjective worthy of notice