conjunction

1. in addition; also; as well as: used to join elements of similar syntactic structure apples and pears; a red and white dress; he begged and borrowed
2. plus; added to 6 and 2 equals 8
3. but; yet; in contrast vegetable oil is digestible and mineral oil is not
4. then again; then in addition: used between two instances of the same word to express repetition or continuity we talked and talked
5. as a consequence or result he told her and she wept
6. then; following this she drove to the store and bought groceries
7. Informal to: used as a sign of the infinitive try and understand
8. as well as other kinds of: used between two instances of the same word to express difference in kind or quality there are painters and painters, my friend
9. Archaic then: used before a sentence and it came to pass
10. Obsolete if

Etymology: ME and, an < OE and, ond; akin to Ger und, OHG unti, OS endi, ON enn: the orig. meaning was “thereupon, then, next”