v. & n. colloq.
v.tr. 1 a promote or increase the reputation of (a person, scheme, commodity, etc.) by praise or advertising; push; increase or assist (boosted his spirits; boost sales). b push from below; assist (boosted me up the tree). 2 a raise the voltage in (an electric circuit etc.). b amplify (a radio signal).
n. 1 an act, process, or result of boosting; a push (asked for a boost up the hill). 2 a an advertisement campaign. b the resulting advance in value, reputation, etc.
[ 19th-c. US word: orig. unkn. ]