ETYM Colloq. U. S.
1. The act of giving an upward push.
2. The act of giving hope or support to someone; SYN. encouragement.

To strengthen a network signal before it is transmitted further.

1. To give a boost to; be beneficial to.
2. To increase or raise; SYN. advance.
3. To increase the voltage of; SYN. supercharge.
4. To push or shove upward, as if from below or behind.