I. noun 1. [ mass noun] — knowledge or experience of something • the pupils had little acquaintance with the language.
2. slight knowledge of or friendship with someone • I renewed my acquaintance with Herbert.
3. a person one knows slightly, but who is not a close friend • a wide circle of friends and acquaintances.
4. [ mass noun] — acquaintances considered collectively • his extensive acquaintance included Oscar Wilde and Yeats.
II. phrases make the acquaintance of (or make someone’s acquaintance) meet someone for the first time and come to know them slightly. • I’m honoured to make your acquaintance, Miss Morland.
III. derivatives acquaintanceship /əˈkweɪntənsʃɪp / noun
– origin Middle English (in the sense ‘mutual knowledge, being acquainted’): from Old French acointance, from acointier ‘make known’ (see acquaint).