Arbor Day

noun

: a day designated for planting trees

Examples of Arbor Day in a Sentence

Recent Examples on the Web

After a poll conducted by the Arbor Day Foundation that put oak well ahead of all other trees, Congress designated the oak the official national tree of the United States in 2004. — Luke Miller, Better Homes & Gardens, 31 Oct. 2026

According to Mark Canney, urban forester with Arbor Day Foundation and director of landscape at Arbor Day Farm, these are the key characteristics. — Madeline Buiano, Martha Stewart, 22 Oct. 2026

Dan Lambe, chief executive of the Arbor Day Foundation, a nonprofit focused on inspiring people to plant trees, hailed the project. — Lila Seidman, Los Angeles Times, 23 May 2026

Arborists and horticulturalists from local organizations recently joined with the Park District of Oak Park for an Arbor Day celebration at Field Park with residents and students at Mann School. — Melinda Moore, Chicago Tribune, 4 May 2026

Word History

Etymology

Latin arbor tree

First Known Use

1863, in the meaning defined above

Rhymes for Arbor Day

• aaa
• alleyway
• alumnae
• anime
• anyway
• arete
• attache
• axillae
• baa
• beaujolais
• bouvier
• breakaway

Kids Definition

Arbor Day

noun

: a day in April set aside as a day to plant trees