ha

1 of 3

interjection

ˈhä 

variants or hah

—used especially to express surprise, joy, or triumph

ha

2 of 3

abbreviation (1)

hectare

HA

3 of 3

abbreviation (2)

1

hemagglutinin

Different circulating influenza A viruses are identified by referring to two signature proteins on their surfaces. One is hemagglutinin (HA), which has at least 15 known variants, or subtypes.

—Jeffery K. Taubenberger et al.

2

hour angle

Synonyms

Interjection

• glory
• glory be
• hallelujah
• hey
• hooray
• hurrah
• hurray
• hot dog
• huzzah
• wahoo [chiefly West]
• whee
• whoopee
• yahoo
• yippee

Examples of ha in a Sentence

Interjection

ha! I was right all along!

Recent Examples on the Web

Interjection

The collection's insurance policy calls for it, ha! —Mark Holgate, Vogue, 25 Oct. 2024

Se ha transformado en una medida de mi progreso y de mi potencial para subir al podio olímpico». —Por Michael Gervais, Harvard Business Review, 13 Aug. 2024

Drop The Niacinamide 15 Serum into your cart and then dispense a few drops (ha) onto your face every day and night to reap the benefits. —Sarah Han, Allure, 21 Sep. 2024

Read in English Post Buy Copies Lo ha estado esperando, esperando, soñando con ello y, por fin, está aquí: el trabajo es suyo. —Por Rebecca Knight, Harvard Business Review, 3 Sep. 2024

Word History

Etymology

Interjection

Middle English, from Old English

First Known Use

Interjection

before the 12th century, in the meaning defined above

Phrases Containing ha

• ha ha
• hoo-ha

Kids Definition

ha

interjection

variants or hah

ˈhä

—used to express surprise, joy, or victory

Medical Definition

HA

abbreviation

hemagglutinin

Seasonal strains … evade our immune systems after vaccination or previous infection by constantly changing the structure of their hemagglutinin (HA) surface protein.

—Charles J. Russell, The New England Journal of Medicine