transitive verb

1. to raise by or as by a push from behind or below; push up
2. to urge others to support; promote to boost a program
3. to make higher or greater; increase in amount, power, etc. to boost taxes, boost electric current
4. Slang to steal; esp., to shoplift

Etymology: < ?

intransitive verb

noun

1. a push to help propel a person or thing upward or forward
2. an act that helps or promotes
3. an increase in amount, power, etc.