de ‧ cel ‧ e ‧ rate /ˌdiːˈseləreɪt/ BrE AmE verb [intransitive] formal
to go slower, especially in a vehicle SYN slow down OPP accelerate
—deceleration /ˌdiːseləˈreɪʃ ə n/ noun [uncountable] :
a deceleration in economic growth
de ‧ cel ‧ e ‧ rate /ˌdiːˈseləreɪt/ BrE AmE verb [intransitive] formal
to go slower, especially in a vehicle SYN slow down OPP accelerate
—deceleration /ˌdiːseləˈreɪʃ ə n/ noun [uncountable] :
a deceleration in economic growth
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012