Stress can mean many things in English depending on the context in which it is used.
It can refer to "word stress" - the position of the stressed syllable in the pronunciation of a particular word.
- Two-syllable nouns in English often - but not always :) - have the stress on the first syllable: record
- Two-syllable verbs in English often - but not, etc. have the stress on the ssecond syllable: record
Other forms of stress
In addition to the above forms of stress an english speaker can also use stress to impart additional information, emphasis or contrast.
In these cases stress can be added through greater loudness, higher pitch and longer duration or a combination of these. The full strong form of a non-content would would also count as stress under this definition.
Stress can refer to "contrastive stress" - where stress is placed on a particular word to indicate a difference of opinion.