Many are partly to entirely black, often with iridescence or bright markings of some sort. Most blackbird species form flocks at certain times of the year, and many form multispecies flocks. Blackbirds live in open habitats and eat seeds, grain, and insects.
The definition of a trepidation is a trembling movement, fear or nervousness. 1  An example of trepidation is when a speaker's hands are shaking due to nerves while giving a speech. 2  An example of trepidation is an anxious feeling before the first day of college.
Full Definition of OPACITY. 1. a: obscurity of sense: unintelligibleness b: the quality or state of being mentally obtuse: dullness. 2. : the quality or state of a body that makes it impervious to the rays of light; broadly: the relative capacity of matter to obstruct the transmission of radiant energy.3. : an opaque spot in a normally transparent structure (as the lens of the eye). See opacity defined for English-language learners.ull Definition of OPACITY. 1. a: obscurity of sense: unintelligibleness b: the quality or state of being mentally obtuse: dullness. 2. : the quality or state of a body that makes it impervious to the rays of light; broadly: the relative capacity of matter to obstruct the transmission of radiant energy.