If you infer that something is the case, you decide that it is true on the basis of information that you already have. I inferred from what she said that you have not been well By measuring the motion of the galaxies in a cluster, astronomers can infer the cluster's mass. = deduce
To derive by deduction or by induction; to conclude or surmise from facts or premises; to accept or derive, as a consequence, conclusion, or probability; to imply; as, I inferred his determination from his silence
Some people use infer to mean `imply', but many people consider this use to be incorrect. The police inferred that they found her behaviour rather suspicious. to form an opinion that something is probably true because of information that you have infer sth from sth (inferre, from ferre )