(idiomatic) To decline to comment, especially on grounds that it might be incriminating.

plural of fifty

The decade of the 1850s, 1950s, etc. / The decade of one's life from age 50 through age 59. / (temperature, rates, plural only) The range between 50 and 59.

From or evoking the 51st through 60th years of a century (chiefly the 1950s).

The start of the sixteenth hour of the day on the 24-hour clock i.e. 15:00. / The number one thousand five hundred. / The year 1500.

plural of fifth

Alternative form of 15 minutes of fame

The fifth amendment to the United States Constitution, which covers several rights, but is used most often quoted regarding the right against self-incrimination.

In the fifth place; fifth in a row.

(slang) An 1800-ml bottle of spirits, especially sake.