a set of questions or problems that are designed to measure a person's knowledge, skills, or abilities
a careful study of a part of the body or of a substance taken from the body
a careful study of a small amount of water, soil, air, etc., in order to see if its quality is good, to find out if it contains a dangerous substance, etc.
2testverb
to use a set of questions or problems to measure someone's skills, knowledge, or abilities —often + on
to examine a part of the body or a substance taken from the body —often + for
to examine a small amount of water, soil, air, etc., in order to see if its quality is good, if it contains a dangerous substance, etc. —often + for —+ for