A contemptible person.
An informer.
A strikebreaker.
To ponder, to go over in one's head.
Idly, the detective thought what his next move should be.
To communicate to oneself in one's mind, to try to find a solution to a problem.
I thought for three hours about the problem and still couldn’t find the solution.
To conceive of something or someone (usually followed by of; infrequently, by on).
I tend to think of her as rather ugly.
To be of opinion (that); to consider, judge, regard, or look upon (something) as.
At the time I thought his adamant refusal to give in right.
To guess; to reckon.
I think she’ll pass the examination.
To plan; to be considering; to be of a mind (to do something).
To presume; to venture.
To seem, to appear.
Any of several birds in the family Ploceidae native to southern Africa.