1. Relating to what is different from what is usual, normal, or expected: While Jill was walking in the forest with Jim, they saw a strange creature which frightened them.

Andrea had a strange feeling when the phone rang and woke her up at 2 a.m.

Strange as it may seem, Jerome doesn't like to walk barefooted on the grass.

2. A reference to something that is not being known, heard, or seen before: Jane's new acquaintance spoke a language that was strange to her.

When Frank's family went on a trip, they arrived in a strange town which they had never encountered before.

3. Etymology: from Latin extraneus, "foreign, unfamiliar, external, from without; outside" and then via French, in which the Latin x sound was changed to an -s sound.