adjective. ['dɪˈsaɪsɪv'] determining or having the power to determine an outcome.
adjective. ['dɪˈsaɪsɪv'] unmistakable.
adjective. ['dɪˈsaɪsɪv'] characterized by decision and firmness.
adjective. ['dɪˈsaɪsɪv'] forming or having the nature of a turning point or crisis.