surf

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

• noun The waves of the sea as they break upon a shore or reef.
• intransitive verb To engage in surfing.
• intransitive verb Informal To look at a variety of things casually, especially while browsing the Internet or television channels.
• intransitive verb To ride on or along (a wave) on a surfboard.
• intransitive verb To engage in surfing at.
• intransitive verb Informal To browse (the Internet or television channels, for example).

from The Century Dictionary.

• noun The bottom or conduit of a drain.
• noun The swell of the sea which breaks upon the shore, or upon banks or rocks.
• noun Synonyms See wave.

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

• noun The swell of the sea which breaks upon the shore, esp. upon a sloping beach.
• noun (Zoöl.) a ploverlike bird of the genus Aphriza, allied to the turnstone.
• noun (Zoöl.) a large clam living on the open coast, especially Mactra solidissima (syn. Spisula solidissima). See Mactra.
• noun (Zoöl.) any one of several species of sea ducks of the genus Oidemia, especially Oidemia percpicillata; -- called also surf scoter. See the Note under Scoter.
• noun (Zoöl.) any one of numerous species of California embiotocoid fishes. See Embiotocoid.
• noun (Zoöl.) See Smelt.
• noun (Zoöl.) See under Whiting.
• noun Prov. Eng. The bottom of a drain.

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

• noun Waves that break on an ocean shoreline.
• noun UK, dialect The bottom of a drain.
• verb To ride a wave, usually on a surfboard.
• verb To browse the Internet.

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

• verb ride the waves of the sea with a surfboard
• verb look around casually and randomly, without seeking anything in particular
• noun waves breaking on the shore
• verb switch channels, on television