Reliable means you can count on someone or something to do what they're supposed to do, when they're supposed to do it. A reliable friend shows up when they promise to meet you. A reliable car starts every morning without problems. A reliable source gives you accurate information you can trust.

When you describe someone as reliable, you're saying they've proven themselves trustworthy through their actions, not just their words. If your older sister reliably picks you up after soccer practice, you know she'll be there even on rainy days or when she's tired.

Reliability matters in both people and things. A reliable clock keeps accurate time. A reliable method for solving math problems works every time you use it. Scientists value reliable experiments that give the same results when repeated. Reliable information comes from sources that have been accurate in the past.

When you consistently keep your promises, finish what you start, and show up when expected, you become someone others trust. A reliable person's steady actions demonstrate their trustworthiness.