From Longman Dictionary of Contemporary Englishon first acquaintanceon first acquaintanceformalKNOW somethingKNOW somebody when you meet someone for the first time Most people are nicer than you think on first acquaintance. → acquaintance
Examples from the Corpus
on first acquaintance• Most people are nicer than you think they are on first acquaintance.• Their interpretability, however, must not be exaggerated; their meanings are not necessarily wholly predictable on first acquaintance.• Route finding can also be difficult so caution is urged on first acquaintance. 