To Condense

1. (transitive) To concentrate toward the essence by making more close, compact, or dense, thereby decreasing size or volume. Synonyms: thicken, simplify, (cooking) reduce; compressAntonym: dilute
2. (transitive, chemistry) To transform from a gaseous state into a liquid state via condensation.
3. (intransitive, chemistry) To be transformed from a gaseous state into a liquid state