1. to amplify sound with the use of electronic equipment ͨ��ʹ�õ���������������
2. We are using this transistor to amplify a telephone signal. ��������ʹ�����־�������Ŵ�绰�źš�
3. An electron tube used to amplify or generate ultrahigh frequency by means of velocity modulation. �ٵ���һ�����ٶȵ��ڵķ����Ŵ�����''��'����Ƶ'��''�ʵĵ��ӹܡ�
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v.
1. increase in size, volume or significance
2. to enlarge beyond bounds or the truth
3. exaggerate or make bigger
4. increase the volume of