a day, varying in date but always in the spring, observed in certain states of the U.S. by the planting of trees.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Arbor Day in a sentence
He made no reply, going on carefully with his arbor-day practice.V. V.'s Eyes | Henry Sydnor Harrison