1. think - Noun
2. think - Verb
To conceive; to imagine.
To seem or appear; -- used chiefly in the expressions methinketh or methinks, and methought.
To employ any of the intellectual powers except that of simple perception through the senses; to exercise the higher intellectual faculties.
To call anything to mind; to remember; as, I would have sent the books, but I did not think of it.
To reflect upon any subject; to muse; to meditate; to ponder; to consider; to deliberate.
To form an opinion by reasoning; to judge; to conclude; to believe; as, I think it will rain to-morrow.
To purpose; to intend; to design; to mean.
To plan or design; to plot; to compass.
To believe; to consider; to esteem.
Source: Webster's dictionaryI think he is very smart Source: Internet
I believe her to be very smart Source: Internet
I think that he is her boyfriend Source: Internet
The racist conceives such people to be inferior Source: Internet
I can't remember saying any such thing Source: Internet
I can't think what her last name was Source: Internet