tel ‧ e ‧ com ‧ mu ‧ ni ‧ ca ‧ tions /ˌtelikəmjuːnəˈkeɪʃ ə nz, ˌtelikəmjuːnɪˈkeɪʃ ə nz/ BrE AmE noun [plural]
the sending and receiving of messages by telephone, radio, television etc:
a new telecommunications system
the telecommunications industry
tel ‧ e ‧ com ‧ mu ‧ ni ‧ ca ‧ tions /ˌtelikəmjuːnəˈkeɪʃ ə nz, ˌtelikəmjuːnɪˈkeɪʃ ə nz/ BrE AmE noun [plural]
the sending and receiving of messages by telephone, radio, television etc:
a new telecommunications system
the telecommunications industry
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012