Alternative letter-case form of Sixties (The decade of the 1860s, 1960s, etc.) / The decade of one's life from age 60 through age 69. / (temperature, rates, plural only) The range between 60 and 69.

From or evoking the 61st through 70th years of a century (chiefly the 1960s).

plural of sixty

The decade of the 1860s, 1960s, etc. (but especially the 1960s) / (US) A period in American history centered around the counterculture movement of the late 1960s.

The cardinal number occurring after fifty-nine and before sixty-one, represented in Roman numerals as LX and in Arabic numerals as 60.

(Canada, historical) The government practice of forcibly taking Aboriginal children away from their families to be brought up in foster care or adopted into white families, which occurred from the late 1950s until the 1980s.

The area of the earth between 60 and 70 degrees south, prone to strong winds and extreme waves

(UK, US) An often nostalgic name for the 1960s.

The cardinal number immediately following sixty-three and preceding sixty-five.

(sexuality) A sex position where two people give each other oral sex at the same time.