In base eight

The answer to “In base eight” in the The Washington Post crossword is OCTAL — a 5-letter word. It most recently appeared in the The Washington Post crossword on September 20, 2026, a Sunday puzzle, at 60-Down, and it has also run on 2 earlier dates with the same answer. Below you'll find why that fill fits, every other answer we've recorded for this clue, and links into the puzzle it came from.

“In base eight” answer

OCTAL (5 letters)

Reveal the solution one letter at a time with the tiles above if you'd rather nudge yourself toward it than see the whole word at once. Just want it outright? The answer is OCTAL.

What does OCTAL mean?

Reading the plain dictionary sense of OCTAL is often the fastest way to see why it answers this clue.

When else has “In base eight” appeared?

The Washington Post reuses clues across dates, sometimes with a different answer depending on the grid. Here's where this exact clue has shown up, and what the answer was each time — handy when you're checking whether today's fill is the only one.

• September 20, 2026 (most recent) → OCTAL
• August 5, 2026 → OCTAL
• August 2, 2026 → OCTAL

Frequently asked questions