What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
proper noun
The largest city of pre-Columbian America, situated about 40 km (25 miles) north-east of Mexico City. Built c.300 BC, it reached its zenith c.300–600 AD, when it was the centre of an influential culture which spread throughout Meso-America. It was sacked by the invading Toltecs c.900.
