Also found in: Encyclopedia, Wikipedia.


1. A landmark visible from the sea, used as a guide in navigation.
2. A buoy or channel marker.
3. A transient natural feature, such as a clump of floating vegetation or a flock of birds in flight, that gives a rough indication of the proximity or direction of land, used as a navigational guide in some traditional seafaring cultures.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Nautical Terms) nautical an aid to navigation, such as a conspicuous object on a shore used as a guide
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



a conspicuous object on land, visible from the sea, serving to guide or warn mariners, as a beacon.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in classic literature ?
These are the official seamarks for the patch of trust- worthy bottom represented on the Admiralty charts by an irregular oval of dots enclosing several fig- ures six, with a tiny anchor engraved among them, and the legend "mud and shells" over all.
The monster trucks might have been the headliners but they were backed up with equally action packed shows from the Guido Louis Equestrian Stunt Team and extreme mountain bike show, before a slight change of pace for the David Seamark Sheepdog demonstration.
The pilot cutter Seamark was for many years a familiar sight in Swansea Bay to both local and visiting seafarers.
THE Seamark story is one of determination, drive and a quest for quality that has created an operation committed to delivering the finest products to dining tables across the globe.
Wales head coach John Kear has made one change to his 21-man squad for their final World Cup match against Ireland in Perth tomorrow - Matt Seamark replaces Josh Ralph after recovering from injury.
Linda Seamark, from Wheatfield Grove, discovered a concealed label on the Scotch Brisket delivered by ASDA Benton that stated the use by date as a day earlier than the new label.
The bruising defeat in Port Moresby has left its mark on Kear's squad, with Chester Butler, Sam Hopkins and Matty Seamark all ruled out through injury.
Danny Ansell, Joe Burke and Gavin Bennion are in for Chester Butler, Sam Hopkins and Matt Seamark as the Welsh look to improve on their 50-6 loss to Papua New Guinea last week.
Wales will be without second rower Chester Butler after he was concussed in last Saturday's game, while forward Sam Hopkins and scrum-half Matty Seamark are both out with shoulder injuries.
Wales: Courtney Davies, Steve Parry (both Gloucs All Golds), Chester Butler (Halifax), Danny Ansell (Hunslet), Sam Hopkins (Leigh), Michael Channing, Ben Evans, Dalton Grant, Elliot Kear, Rhys Williams (all London Broncos), Matty Barron (Newcastle Thunder), Joe Burke (Oldham), Gavin Bennion (Rochdale Hornets), Craig Kopczak (Salford Red Devils), Matty Fozard (Sheffield Eagles), Andrew Gay, Christiaan Roets (both South Wales Ironmen), Regan Grace, Morgan Knowles, Ben Morris (all St Helens), Rhodri Lloyd (Swinton Lions), Josh Ralph (Tweed Head Seagulls), Phil Joseph (Workington Town), Matty Seamark (Manly Seagulls).
The team on Perpetual Loyal poised to unfurl the downwind turbocharger once clear of the seamark.
Throughout his career, he has held several executive positions including, but not limited to, president and chief executive officer at Seamark Asset Management, president and chief operating officer at Blackmont Capital and, Managing director, Head of Wealth Management for CIBC Oppenheimer's US distribution business.