From Longman Dictionary of Contemporary Englishldoce_239_bobeliskob‧e‧lisk /ˈɒbəlɪsk $ ˈɑː-, ˈoʊ-/ noun [countable] 
AATBBa tall pointed stone pillar, built to remind people of an event or of someone who has died
AATBBa tall pointed stone pillar, built to remind people of an event or of someone who has diedExamples from the Corpus
obelisk• In the middle of the wood was an obelisk commemorating the Emperor.• Hot water poured out the tops of basalt pillars that normally stand as cold obelisks in the middle of drained-back lava ponds.• Above the col jutted the imposing obelisk of Ama Dablam.• It is in the form of a 20-foot high stone obelisk, and gives distances to no less than 3 6 towns.• I copied the inscriptions on the plaque and the obelisk in my notebook.• My father went out and I was left alone with the obelisk.• In the adjoining Garden on the Ramparts stand two obelisks marking the place where the victims of the Defenestration fell in 1618.Origin obelisk (1500-1600) Latin obeliscus, from Greek, from obelos “pointed pillar” 