Slew/sluː/ Definition 1 of 2Pro Tip 1/3Large Quantity Slew indicates a high volume but can be vague—exact number isn't specified. After the sale, there was a slew of orders to process. Pro Tip 2/3Emphasis on Variety Often used when implying a variety or range within the large amount. She had a slew of excuses for being late. Pro Tip 3/3Conversational Tone Generally found in informal or spoken English rather than formal writing. We've got a slew of games to play at the party.