Related Clues:

• Ref. with more than 2 1/2 million quotations
• Ref. work that took 70 years to complete
• Its first complete ed. was published in 1928
• Ref. with about 600,000 word-forms
• Source with 600,000 words
• Massive ref
• Venerable ref
• Massive Brit. reference
• Ref. with about 22,000 pages
• Heavy ref
• Work that's been punningly called a 'lex icon': Abbr
• UK reference
• Word ref. started in 1857
• Wordsmith's ref
• Heavy Brit. reference set