ob ‧ e ‧ lisk /ˈɒbəlɪsk $ ˈɑː-, ˈoʊ-/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ; Origin: obeliscus , from Greek , from obelos 'pointed pillar' ]
a tall pointed stone ↑ pillar , built to remind people of an event or of someone who has died