1. They looked around when he called.

Question

2. He was not at home when he called.
3. They looked around when he called me.
4. He was not at home when he called me.
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In #1, does 'called' means 'made a phone call' or 'sounded loudly'?
What about in Sentence 2?
What about in #3 and #4?

Answer 1

Either meaning could be true for all four sentences. Everything depends on context. Single sentences can't always tell you all you need to know about a word and its meaning.