Princeton's WordNet

1. landmark(noun)

   the position of a prominent or well-known object in a particular landscape

   "the church steeple provided a convenient landmark"

2. landmark, turning point, watershed(noun)

   an event marking a unique or important historical change of course or one on which important developments depend

   "the agreement was a watershed in the history of both nations"

3. landmark(noun)

   a mark showing the boundary of a piece of land

4. landmark(noun)

   an anatomical structure used as a point of origin in locating other anatomical structures (as in surgery) or as point from which measurements can be taken

Kernerman English Learner's Dictionary

1. landmark(noun)ˈændmˌɑɑrk

   a building or other feature by which a place is recognized

   The church was the city's most famous landmark.

2. landmarkˈændmˌɑɑrk

   an important or significant event or achievement in a process

   a painting that was a landmark in the history of art

3. landmark(adjective)ˈændmˌɑɑrk

   important or significant in a process

   a landmark tax case

Wiktionary

1. landmark(Noun)

   a recognizable natural or man-made feature used for navigation

2. landmark(Noun)

   a notable building or place with historical, cultural, or geographical significance

3. landmark(Noun)

   a major or important item, denoting a change of direction or marking a beginning or an end

4. landmark(Verb)

   To officially designate a site or building as a landmark.

Origin: From land + mark.

Webster Dictionary

1. Landmark(noun)

   a mark to designate the boundary of land; any , mark or fixed object (as a marked tree, a stone, a ditch, or a heap of stones) by which the limits of a farm, a town, or other portion of territory may be known and preserved

2. Landmark(noun)

   any conspicuous object on land that serves as a guide; some prominent object, as a hill or steeple

Dictionary of Military and Associated Terms

1. landmark

   A feature, either natural or artificial, that can be accurately determined on the ground from a grid reference.

• bakenAfrikaans
• عَلامَهArabic
• ориентирBulgarian
• marcoPortuguese (BR)
• orientační bodCzech
• das (See)ZeichenGerman
• vartegnDanish
• ορόσημοGreek
• marca, señalSpanish
• orientiirEstonian
• نشانه طبیعیFarsi
• maamerkkiFinnish
• (point de) repèreFrench
• תַּו קַרקַעHebrew
• चिह्नHindi
• orijentirCroatian
• tereptárgy, iránypontHungarian
• tanda pengenal medanIndonesian
• kennileiti, leiðarmarkIcelandic
• punto di riferimentoItalian
• 目じるしJapanese
• (항행이나 여행자를 위한) 표지물Korean
• orientyrasLithuanian
• orientierisLatvian
• tanda tempatMalay
• oria antatiepuntDutch
• landemerke, kjennetegnNorwegian
• punkt orientacyjnyPolish
• نشانه طبیعیPersian
• طبيعى نښانهPashto
• marcoPortuguese
• (punct de) reperRomanian
• наземный ориентирRussian
• orientačný bodSlovak
• orientacijski znakSlovenian
• znakSerbian
• landmärkeSwedish
• จุดสังเกตThai
• nirengi noktasıTurkish
• 地標Chinese (Trad.)
• береговий знак; орієнтирUkrainian
• کسی علاقے کا نمایاں امتیازی مقام یا نشانUrdu
• mốcVietnamese
• 界标Chinese (Simp.)