Technically, Allah Akbar is a comparative or superlative. It means either “Allah is greater” (than your god) or “Allah is greatest” (among the gods). Via the AP: 

The lone fugitive from the Spanish cell that killed 15 people in and near Barcelona was shot to death Monday after he flashed what turned out to be a fake suicide belt at two troopers who confronted him in a vineyard not far from the city he terrorized, authorities said.

Police said they had “scientific evidence” that Younes Abouyaaqoub, 22, drove the van that barreled through Barcelona’s crowded Las Ramblas promenade, killing 13 people on Thursday, then hijacked a car and fatally stabbed its driver while making his getaway.

Abouyaaqoub’s brother and friends made up the rest of the 12-man extremist cell, along with an imam who was one of two people killed in what police said was a botched bomb-making operation.

After four days on the run, Abouyaaqoub was spotted outside a train station west of Barcelona on Monday afternoon. A second witness told police she was certain she had seen the man whose photo has gone around the world as part of an international manhunt.

Two officers found him hiding in a nearby vineyard and asked for his identification, according to the head of the Catalan police. He was shot to death when he opened his shirt to reveal what looked to be explosives and cried out “Allah is great” in Arabic, regional police chief Josep Luis Trapero said.