pledged or bound to a certain course or policy; dedicated

a committed environmentalist

in or denoting a long-term emotional relationship

a committed relationship

Esther has a committed boyfriend

perpetrate or carry out (a mistake, crime, or immoral act)

he committed an uncharacteristic error

pledge or bind (a person or an organization) to a certain course or policy

they were reluctant to commit themselves to an opinion

the treaty commits each party to defend the other

try it out before you commit to a purchase

transfer something to (a state or place where it can be kept or preserved)

he composed a letter but didn't commit it to paper

she committed each tiny feature to memory