| 1 | They meet through friends or over the Internet. | |
| 2 | Think of the difference between friendships and acquaintances. | |
| 3 | Marked by close acquaintance, association, or familiarity. | |
| 4 | It was stupid of him to presume on an all too brief acquaintance. | |
| 5 | Mr Brown and his wife corresponded for many years before they met. |