Entry 2 senses · 2 variants Webster, 1913 jumbo /(jŭm"bō̇)/ · jum·bo · IPA /ˈd͡ʒʌmboʊ/ a. n. 01 a. Very large. 1. Very large. 02 n. Any object which is a very large example of its class. 1. Any object which is a very large example of its class.