Entry 2 senses · 2 variants Webster, 1913 Oblong /äb'-lông/ · Ob·long · IPA /ˈɑblɔŋ/ a. n. 01 a. Having greater length than breadth, esp. when rectangular. 1. Having greater length than breadth, esp. when rectangular. 02 n. A rectangular figure longer than it is broad; hence, any figure longer than it is broad. 1. A rectangular figure longer than it is broad; hence, any figure longer than it is broad. “The best figure of a garden I esteem an oblong upon a descent.” — Sir W. Temple.