Valence (noun)

1. Chemistry: the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.
2. Psychology: the emotional charge or significance attached to an event, experience, or object.
3. Linguistics: the semantic role of a noun or noun phrase that determines the way it combines with other elements in a sentence to show the relationships among them.

Origin:

Late 19th century: from french, from latin valentia "strength, capability", from valere "be strong".

Examples:

1. In chemistry, the valence of an element determines its reactivity.
2. The valence of the experience was very positive for him.
3. In linguistics, the valence of a noun can be changed by adding an adjective or adverb.
4. The valence of the word has changed over time due to its increased usage.
5. The valence of the event was different for each participant based on their individual experiences.