Breadcrumb Home > Thesaurus > X Synonyms of xi Find synonyms for: Noun 1. eleven, 11, XI, large integer usage: the cardinal number that is the sum of ten and one 2. xi, letter, letter of the alphabet, alphabetic character usage: the 14th letter of the Greek alphabet Adjective 1. eleven, 11, xi, cardinal (vs. ordinal) usage: being one more than ten WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of xi (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language