plural of eighty

The decade of the 1880s, 1980s, etc. / The decade of one's life from age 80 through age 89. / (temperature, rates, plural only) The range between 80 and 89.

The number one thousand eight hundred. / The start of the nineteenth hour of the day on the 24-hour clock i.e. 18:00. / The year 1800.

By a factor of eight.

Eight times as much; multiplied by eight. / Containing eight parts.

(physics) a theory that organizes subatomic particles into octets

(Royal Navy slang, 18th century) The Admiral's share of any booty or prize captured by any ship under his command.

In the eighth place; eighth in a row.

(archaic) One hundred and sixty (160).

plural of eighteen