1.  think about(v = verb.cognition) - have on one's mind, think about actively; "I'm thinking about my friends abroad"; "She always thinks about her children first"
is one way to cerebrate, cogitate, think
Sample sentences: Somebody ----s something; Somebody ----s somebody

2.  think about(v = verb.cognition) entertain, flirt with, think of, toy with - take into consideration, have in view; "He entertained the notion of moving to South America"
is one way to contemplate
Sample sentences: Somebody ----s something; Somebody ----s VERB-ing

think, think back, think factory, think nothing of, think of, think out, think over, think piece, think tank, think the world of, think twice, think up