A2the number 100: We've driven a/one hundred miles in the last two hours."How many children are there in the school?" "About three hundred."That dress costs hundreds of pounds.Cardinal numbers, including nought and zeroa hundred/hundreds of sthB2informal›a large number: There were hundreds of people at the pool today.There are a hundred shirts waiting to be ironed.Large in number or quantitythe hundreds›numbers between 100 and 1,000: He expects the total amount to be in the low hundreds.Cardinal numbers, including nought and zerothe eighteen hundreds, nineteen hundreds, etc.›the years of a particular century: The house was built in the sixteen hundreds.Specific periods of timeone hundred, two hundred, etc. hours›used to say the time using the 24-hour system, especially used in the military: Breakfast is at seven hundred hours.Describing when something happened or will happen