Real Dictionary

guava
variable noun: A guava is a round yellow tropical fruit with pink or white flesh and hard seeds.

guava in American English
any of several tropical American plants (genus Psidium) of the myrtle family, esp. a tree (P. guajava) bearing a yellowish, round or pear-shaped, edible fruit
noun: any of numerous tropical and subtropical American trees or shrubs belonging to the genus Psidium, of the myrtle family, esp. P. guajava, bearing large, yellow, round to pear-shaped fruit, and P. littorale, bearing smaller, yellowish to deep-red, oval frui

guava in British English
noun: any of various tropical American trees of the myrtaceous genus Psidium, esp P. guajava, grown in tropical regions for their edible fruit