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OS n. [
os] a mouth or mouthlike opening
. wn #2
OS n. [
osmium, Os, atomic number 76] a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
. wn #3
OS n. [
operating system] (computer science) software that controls the execution of computer programs and may provide various services
. wn #4
OS n. [
oculus sinister] the left eye
. wn #5
OS n. [
bone, os] rigid connective tissue that makes up the skeleton of vertebrates
. wn