prominent

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

• adjective Projecting outward or upward from a line or surface; protuberant.
• adjective Immediately noticeable; conspicuous: synonym: noticeable.
• adjective Widely known; eminent.

from The Century Dictionary.

• Standing out beyond the line or surface of something; jutting; protuberant; in high relief: as, a prominent figure on a vase.
• In entomology: Raised above the general surface: as, prominent eyes.
• Projecting horizontally: as, prominent angles of the prothorax.
• Standing out so as to be easily seen; most visible or striking to the eye; conspicuous: as, the figure of a man is prominent in the picture.
• Standing out from among the multitude; distinguished above others: as, a prominent citizen.
• Eminent, leading.
• noun A promontory.
• noun One of certain bombycid moths; a tooth-back or pebble.

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

• adjective Standing out, or projecting, beyond the line surface of something; jutting; protuberant; in high relief.
• adjective Hence; Distinctly manifest; likely to attract attention from its size or position; conspicuous
• adjective Eminent; distinguished above others.
• adjective (Zoöl.) any moth of the family Notodontidæ; a notodontian; -- so called because the larva has a hump or prominence on its back. Several of the species are injurious to fruit trees.

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

• adjective Standing out, or projecting; jutting; protuberant.
• adjective Likely to attract attention from its size or position; conspicuous.
• adjective Eminent; distinguished above others.

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

• adjective having a quality that thrusts itself into attention
• adjective conspicuous in position or importance